The Intrapartum and Postpartum Care of Women Following Assisted Reproduction Techniques (ART)




© Springer International Publishing Switzerland 2017
Kanna Jayaprakasan and Lucy Kean (eds.)Clinical Management of Pregnancies following ART10.1007/978-3-319-42858-1_11


11. The Intrapartum and Postpartum Care of Women Following Assisted Reproduction Techniques (ART)



Sonia Asif  and Srini Vindla 


(1)
Division of Obstetrics, Gynaecology, and Child Health, Queens Medical Centre, Nottingham, UK

(2)
Department of Obstetrics and Gynaecology, Sherwood Forest Hospitals NHS Foundation Trust, Sutton-In-Ashfield, UK

 



 

Sonia Asif (Corresponding author)



 

Srini Vindla



Keywords
Obstetric carePregnancy complicationsLabourBreastfeedingPsychological impactART



Introduction


Birth planning for women after assisted reproduction is an important facet of care. Understanding the complex literature to identify which aspects are pertinent to women who may have complex pregnancies not as a result of ART but because of their individual characteristics is challenging. In this chapter we aim to create an understanding of what the evidence presents about birth and outcomes for babies after ART.

Planning for birth must include an understanding of the psychological issues, the various pre-pregnancy risk factors, the progress of the pregnancy, and the expectations and needs of the parents.


Recognition of the Psychological Effects of ART


The need to understand the psychology of couples who have been through ART, and the impact that this has on both them and their maternity team is vital. Undergoing fertility treatment is physically, psychologically and financially demanding and not unlike being on an “emotional rollercoaster” [1]. Recognition of the potential for significantly increased psychological and emotional needs of couples is helpful to those involved in care [2, 3]. Women with IVF pregnancies have been shown to be more anxious throughout pregnancy [4]. Patients who have conceived through IVF present with antenatal complaints earlier and more frequently, increasing personal and medical anxiety [5]. This has also been shown to have a “knock-on” effect on medical intervention [6, 7]. They are more likely to be admitted when presenting with problems and may need more reassurance that normal symptoms of pregnancy, such as backache, are not something more serious [8].

There is evidence that obstetricians and midwives view patients who conceive through ART differently with regard to how they manage birth. Elective caesarean section (CS) rates for maternal request are higher in most countries in pregnancy after ART, with rates of 50 % or more being seen in some countries.

This protective attitude is especially evident in older women who may have had multiple attempts to conceive and in whom achieving another pregnancy may prove challenging. Concern about minimising adverse fetal outcomes and fear of litigation lead to a lower threshold for intervention, induction of labour, or operative delivery.

The mental well-being and psychological coping strategies of women who conceive with ART are also different from spontaneously conceived pregnancies. Some studies [9] cite that the emotionally demanding aspects of fertility treatment positively prepares some women to deal with the unexpected complications of childbirth whereas other authors state that these same factors can lead to anxiety about delivery [10]. Interestingly parents of both IVF and naturally conceived pregnancies find parenthood similarly stressful [11].


Birth Outcomes After ART?: How Do They Differ?


In the UK national guidance on antenatal care advises that women conceiving with ART do not have to be booked under an obstetrician unless there are additional risk factors [12]. However, before deciding on whether consultant led care is required, it is important that a full assessment of the obstetric risks associated with non-spontaneous conception is undertaken. Antenatal assessment of risk factors is discussed in other chapters.

The clinician managing labour may not have been involved in the delivery of antenatal care and so a thorough understanding of those risks that will be pertinent to labour is important.

Data from two large robust systematic reviews [13, 14] concluded that singleton IVF pregnancies compared to naturally conceived pregnancies, were more likely to have preterm (<37 weeks), very preterm (<32 weeks), low birth weight (<2500 g), very low birth weight (<1500 g) and small for gestational age babies. Recent data from Australia suggest that the larger part of this risk appears to be related to the infertility itself rather than the assisted conception, as risks were actually highest in pregnancies conceived spontaneously after a period of prolonged infertility [15]. Few studies have examined actual outcomes in labour for women after assisted conception compared to control groups. On large study from the Netherlands where pregnancies were very carefully matched at booking showed that the outcomes for labour were not significantly different except that delivery occurred approximately 3 days earlier on average in the IVF group amongst women who spontaneously laboured. There were more elective CS in the IVF group and slightly more assisted vaginal deliveries in the control group. Induction rates were no different. Birthweight centiles were slightly lower for babies born after IVF but neonatal outcomes for term babies were similar [16].


Approach for Birth Planning


Pre-birth planning should be undertaken with every woman, regardless of method of conception. The appropriate professional to undertake this may be the midwife in the UK, if the pregnancy has progressed normally and there are no additional fetal or maternal risks identified. Conversely the obstetric team may have to fulfil this role, where midwives are not available or where complications or risks have been identified or where a couple wish to discuss alternative birth options to those offered by the midwife. Many women who have conceived after ART but are otherwise well are keen to avoid medicalisation and want to feel and be treated as normal, equally others feel that their journey to pregnancy has been complex and they need to discuss at length what choices they have with regard to birth, to minimise any risk to the baby.

The clinician should be able to present choices and the rationale for why some options may be recommended. In order to be in a position to provide appropriate information, maternal and fetal surveillance should have been undertaken according to identified risk factors, to ensure that issues such as fetal growth problems, placental issues, maternal medical problems and psychological needs have been identified prior to a final planning discussion.

Where complications have developed these should be managed in line with national guidelines where available. In the UK the most pertinent guidelines are: National Institute for Health and Clinical Excellence (NICE): Hypertension in pregnancy [17], Diabetes in pregnancy [18], Management of multiple pregnancies [19] and the Royal College of Obstericians and Gynaecologists (RCOG) guideline on Placenta praevia, accreta and vasa praevia with the National Patient Safety Agency care bundle for the management of placenta praevia after previous CS [20].

The key aspects for birth planning will include:



  • Timing of birth


  • Method of delivery


  • Fetal monitoring preferences


  • Alternative options for when the unexpected happens (with particular regard to pre-term birth)


  • Additional precautions that may be needed to ensure a safe birth


  • Postnatal care and support


Planning and Timing of Birth in Relationship to Identified Risk Factors



Increased Maternal Age


Delayed conception has led to a worldwide increase in the age of childbearing. Additionally, ART has also offered treatment for older women to overcome infertility related to advanced age.

Induction of labour at 39 weeks in women of 35 or more with an uncomplicated first pregnancy, has been addressed in a recent trial. The primary outcome measure was delivery by caesarean section. There was no difference in this outcome between the induction at 39 weeks or usual time (41–42 weeks). The caesarean section rate was 32 and 33 % respectively. No difference in fetal outcome was seen but the trial was not sufficiently powered to look at stillbirth prevention.

This trial does not support routine induction of labour in primigravida for age alone, but does provide safety data to support women’s request for induction after 39 weeks as a safe option. Interestingly the primary reason for women choosing not to be randomised was because they did not wish to be induced at 39 weeks [21].


Hypertension


The cumulative effects of advanced maternal age, primiparity, and IVF all act synergistically to increase the risk of hypertension. Advanced maternal age (>35 years) is known to be a risk factor for pregnancy induced hypertension (PIH) and gestational diabetes. These risks are much more pronounced in older women who are nulliparous and have a multiple pregnancy conceived with ART.

The aging process leads to systemic dysfunction of the endothelial cells in the vasculature and may be the pathophysiological basis for the age related increase in PIH risk. The higher incidence of pre-eclampsia hypertensive disorders in women over the age of 40 is in itself a risk factor for PET. The association between IVF and PIH is not fully understood and is discussed in more detail in Chap. 9 on maternal complications during pregnancy.

NICE guidance recommends low dose aspirin at a dose of 75 mg from 12 weeks for women with two or more of the following risk factors for PET risk reduction:



  • First pregnancy


  • Age 40 or more


  • An interval greater than 10 years since your last pregnancy


  • Significant obesity – a body mass index (BMI) of 35 kg/m2 or more at the first visit


  • Family history of PET


  • Multiple pregnancy

This will cover a large number of women conceiving after ART. In addition the fertility team may have advised aspirin during pregnancy for fertility treatment reasons.

NICE guidance recommends birth within 24–48 hours for women who have pre-eclampsia with mild or moderate hypertension after 37 weeks.

Recently, investigators of the HYPITAT (Pregnancy-induced hypertension and pre-eclampsia after 36 weeks: induction of labour versus expectant monitoring: A comparison of maternal and neonatal outcome, maternal quality of life and costs) randomized trial evaluated maternal and neonatal complications in patients at 36–40 weeks’ gestation who were randomized to either induction of labour or expectant monitoring. The results of this trial revealed that induction of labour at or after 37 weeks was associated with lower rate of maternal complications without increased rates of either CS or neonatal complications [22]. This data support delivery after 37 weeks in women with hypertension in pregnancy.

Consideration must be given to fetal risks, however, when the chosen route for delivery is by elective CS. Where this is the case, discussion of outcomes for the baby must be balanced when delivery is proposed earlier than 39 weeks. Corticosteroids for fetal lung maturation should be given when delivery by elective CS is planned before 39 weeks [23].


Gestational Diabetes (GDM)


GDM has been associated with pregnancies that are conceived with ART. Ashrafi et al. concluded that singleton pregnancies conceived with IVF are twice as likely to develop GDM as their spontaneous counterparts [24].

GDM is associated with adverse obstetric outcomes, including an increased risk of PIH/PET, macrosomia, shoulder dystocia, birth injuries and caesarean section. Neonatal complications include respiratory distress syndrome, hypoglycaemia and jaundice [25].

The possible reasons for this are multifactorial, but clearly the higher proportion of ART patients with advanced maternal age, obesity, multiple pregnancy and polycystic ovarian syndrome (PCOS) will contribute to this increase. However, additionally, the actual process of IVF has also been implicated. It is thought that hormones produced as a result of the ovulation induction and luteal support phases of IVF may be associated with insulin resistance. The presence of underlying metabolic and vascular factors may also be exacerbated with the hormonal stimulation used in the initial stages of ovulation induction.

In the UK, women with confirmed diabetes in pregnancy, planning for birth should be undertaken using the guidance provided by NICE [18]. The key statements are:



  • Explain to pregnant women with diabetes who have an ultrasound-diagnosed macrosomic fetus about the risks and benefits of vaginal birth, induction of labour and caesarean section.



    • The RCOG guideline on “shoulder dystocia, 2012” [26] states that “infants of diabetic mothers have a two- to four-fold increased risk of shoulder dystocia compared with infants of the same birth weight born to non-diabetic mothers. Elective CS should be considered to reduce the potential morbidity for pregnancies complicated by pre-existing or gestational diabetes, regardless of treatment, with an estimated fetal weight of greater than 4.5 kg.”


  • Advise women with gestational diabetes to give birth no later than 40 + 6 weeks, and offer elective birth (by induction of labour, or by CS if indicated) to women who have not given birth by this time.


  • Consider elective birth before 40 + 6 weeks for women with gestational diabetes if there are maternal or fetal complications.


Multiple Pregnancies


In the UK around 15–20 % of IVF pregnancies result in a twin birth compared to the 1–1.5 % conceived spontaneously [27]. Despite improvements in both obstetric and neonatal care, twin pregnancies have a poorer outcome compared to singleton pregnancies.

Whether twin pregnancies conceived through ART are at higher risk that those conceived naturally is not clear cut, with some studies stating a higher risk, and others citing no trend [28]. This issue is covered further in Chap. 8 on multiple pregnancy.

With regard to birth outcomes the two largest systematic reviews on the perinatal and obstetric outcomes of twin pregnancies following ART [13, 14, 29] have found conflicting conclusions. McDonald et al. [29] found that IVF conceived twins pregnancies were more likely to experience antepartum haemorrhage (APH) and disorders of placentation such as placenta praevia (PP). They were also at a slightly higher risk of being delivered by CS and babies were twice as likely to be admitted to the neonatal unit.

The controversy in the data exists mainly because most studies looking at obstetric outcomes in ART twin pregnancies have a cohort design with no matched control group and small numbers. Invariably there are few distinctions made in terms of stratifying patients according to the fertility treatment, i.e., IVF vs Intracytoplasmic sperm injection (ICSI). There is also sparse information available on the chronicity of the twins included, pre-existing maternal medical conditions, parental BMI, and smoking status.

The main birth considerations for multiple pregnancies will be:



  • Vigilance for and management of suspected or actual preterm labour


  • Appropriate method for birth, determined by fetal sizes, number, presentation, placental site, gestation and maternal wishes.

The twin birth study (TBS) [30] has demonstrated that in uncomplicated twin pregnancies between 32 and 39 weeks, there is no benefit in delivery by CS. In the group randomised to vaginal birth, if labour occurred 65 % of women achieved a vaginal birth. The overall vaginal birth rate for this group was 44 %, but a third of caesarean sections were performed before labour, either for maternal complications, bleeding or failed induction of labour.

Where there is a discrepancy in predicted birthweight, the rate of complications rises. Variously the rise in risk has been described as occurring with a 18, 20 and 25 % discrepancy. This does not seem to translate into delivery problems until the discrepancy is 40 %; however, given the wish to minimise any complications, it would seem reasonable to use 20–25 % as a threshold for considering CS as the better option. Interestingly, significant expected birthweight discordancy was an exclusion in the twin birth study, in the TBS, but the definition is not given in the published results.

Higher order multiple pregnancies are usually delivered by CS, at gestations of viability, simply because fetal monitoring is so much more difficult though some units will consider vaginal births for healthy triplets.

In the TBS the rate of CS after delivery of the first twin was 4.2 %. This rate is lower than that seen in many units. It is vital therefore, when counselling women regarding method of delivery, that the counselling includes the ability to provide an experienced acchoucheur if vaginal birth is planned. In particular a practitioner experienced with breech birth as even when both twins are presenting by the vertex, 20 % of second twins will change presentation after delivery of the first twin.

Units that cannot provide a safe vaginal delivery should recommend delivery by CS. It is important to recognise, however, that even when CS is planned 10 % of women may deliver vaginally and still need good quality care.

Where the first twin is breech, many units would recommend CS as the best option. In the TBS 7 % of pregnancies had a breech first twin, and no differences were seen in this group. However, given current trends CS is likely to be the choice of most women in this circumstance.


Timing of Birth in Multiple Pregnancies


Guidance as to the timing of birth for multifetal gestations varies depending on country. In the UK, NICE guidance recommends delivery at 36–37 weeks for uncomplicated monochorionic diamniotic (MCDA) twins and 37–38 for uncomplicated dichorionic diamniotic (DCDA) twins [12]. Recommended delivery for triplets is at 34 weeks.

In the USA the thresholds for twins are a week later, taking into account that although the stillbirth rate peaks at 37 for MCDA and 38 for DCDA twins, there is additional neonatal mortality in a small number born earlier. Steroid cover should be considered for MCDA twins if following NICE guidance and for DCDA if delivery is planned by CS [12].


Monitoring of Multiple Pregnancies in Labour


Electronic fetal monitoring (EFM) is usually recommended in twin pregnancies. This is not on the basis of data supporting improved outcomes, but rather because intermittent monitoring is almost impossible. Women should understand this recommendation and also that it is often easier to obtain two traces using a fetal scalp electrode for the presenting twin.

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Aug 25, 2017 | Posted by in GYNECOLOGY | Comments Off on The Intrapartum and Postpartum Care of Women Following Assisted Reproduction Techniques (ART)

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