Some, but not all, studies have demonstrated an increased risk of miscarriage among women who take antidepressants. However, it has been difficult to determine whether this increased risk was related to exposure to the medication [...]
Pregnancy is a time of risk for women with histories of major depression. In a study where 201 women with histories of recurrent depression were followed prospectively through pregnancy, 43% experienced a relapse of major depression during pregnancy. Relapse rates were highest in the group of women who elected to discontinue antidepressant treatment proximate to conception (68% as compared to 26% in the group of women who maintained antidepressant treatment).
In a recent retrospective cohort study, data collected from linked records from the Women's and Children's Health Network in South Australia were used to investigate neonatal outcomes in children exposed prenatally to selective serotonin reuptake inhibitors (SSRIs). Women were included in this study if they gave birth to a singleton, live-born infant between September 2000 and December 2008 (n = 33,965).
Over the past few years, there have been a large number of studies which have relied on large administrative databases to generate information on the reproductive safety of various medications. One of the strengths of this type of approach is that it provides an opportunity to observe outcomes in a large number of subjects; however, there are certain, very important limitations. A recent study published in the American Journal of Obstetrics and Gynecology helps to understand some of the challenges in interpreting the data generated from these studies.
About half of all pregnancies are unplanned. In this situation, many women who conceive while on psychotropic medications decide to abruptly stop their medications when they discover they are pregnant.  While this may seem like the safest option, in terms of protecting the developing fetus, we have data demonstrating high rates of relapse in women who discontinue antidepressant medications or mood stabilizers proximate to conception. We now have data (from several studies in non-pregnant populations) to indicate that the rate of medication discontinuation (abrupt vs. gradual) may also affect risk of relapse.
Increased muscle tone, jitteriness, sleep disturbance, irritability, feeding problems, mild respiratory distress and myoclonus have been reported as symptoms of a potential neonatal distress syndrome related to exposure to SSRIs in late pregnancy. The average duration of symptoms reported is 48 hours. It is estimated that between 25-30% of SSRI-exposed infants are at risk for this syndrome. No treatment intervention is required. Reassuringly, follow-up studies have shown that at 2, 4, 6, and 8 months SSRI-exposed infants are indistinguishable from control infants without known exposure.
Pregnancy and the postpartum period is a time of increased risk for depression. Therefore, women who are treated with antidepressant medications must consider whether or not to stay on medication during pregnancy. Despite reassuring data regarding the reproductive safety of various antidepressants, a woman may prefer not to continue medication during pregnancy due to concerns about long term effects of medication on the baby. However, by discontinuing antidepressant medication, a woman increases her risk of depression during pregnancy. This is a highly personal decision for women as the potential risks of continuing medication must be weighed against the possibility of relapse and the potential effects of untreated depression on the pregnancy and baby.
Hypertension in pregnancy is generally defined as a diastolic blood pressure of 90 mm Hg or greater or a systolic pressure at or above 140 mm Hg. Preeclampsia is defined as the development of hypertension with proteinuria or edema induced by pregnancy, generally in the second half of gestation. It is more common in women who have not carried a previous pregnancy beyond 20 weeks and in women at the extremes of the reproductive years.
