As more research is conducted within the field of women's mental health, there are times when recommendations may change depending on the available data.  We will discuss a case here to illustrate this point.
Most obstetricians are now familiar with the potential for what has become known as neonatal distress syndrome (or "adaptation" syndrome) following third trimester exposure to SSRIs. Some patients still worry about the possibility of their baby developing neonatal distress syndrome, especially if anything unusual happened during the post-delivery experience of an earlier pregnancy. Women may be concerned about whether and to what degree the medication they were on played a role in their infant's distress and whether to continue that medication during a subsequent pregnancy. The following case may help illustrate the decision-making dilemmas.
Despite efforts over the last decade to increase awareness regarding the negative effects of alcohol and other drug use during pregnancy, substance abuse among pregnant women continues to be a significant problem in the United States. The 2003 National Household Survey on Drug Use and Health indicated that 9.3% of pregnant women used alcohol and 4.3% percent of pregnant women used illicit drugs. In other countries, the prevalence of substance use and abuse may be even higher. For example, in a recent survey of pregnant women in Ireland, 54% admitted to drinking alcohol during pregnancy.
A new study reported in Human Reproduction supports what many other studies have found, that untreated depression during pregnancy increases the likelihood of delivering before 37 weeks gestation.
In 2006, Chambers and colleagues published an article linking SSRI use during late pregnancy to an increased risk of persistent pulmonary hypertension in the newborn (PPHN). Based on the results of this analysis, the authors estimated the risk of PPHN to be about 1% in infants exposed to SSRIs late in pregnancy (after 20 weeks). However, subsequent studies did not demonstrate a significant association between PPHN and SSRI usage. A new study, this one relying upon data from the Swedish Medical Birth Register, has observed an elevated risk of PPHN among SSRI-exposed infants.
The U.S. Food and Drug Administration (FDA) has proposed major revisions to prescription drug labeling in order to provide more accurate and helpful information on the effects of medications used during pregnancy and breastfeeding. As it stands, the current system used by the FDA classifies the reproductive safety of medications using five risk categories (A, B, C, D and X) based on data derived from human and animal studies. While widely used to make decisions regarding the use of medications during pregnancy, many have criticized this system of classification, indicating that this type of drug labeling is often not helpful and, even worse, may be misleading.
It has been postulated that psychological stress in the mother, if present at a critical time of brain development, can permanently alter a child's response to stress and may have long-term negative consequences. In response to stress, blood flow to the uterus is restricted and the fetus receives fewer nutrients, which may result in lower birth weight. Several studies have demonstrated an association between maternal stress and low birth weight, and it is felt that low birth weight is a marker for stressful intrauterine conditions.
In 2006, GlaxoSmithKline (GSK) elected to change product label warnings for the antidepressant paroxetine (Paxil), advising against the use of this drug by women who are pregnant. This decision was based on preliminary studies which suggested an increase in the risk of cardiovascular malformations among infants exposed to paroxetine in utero. A recent study from the Motherisk Program in Toronto has reported on the outcomes of over 3000 paroxetine-exposed infants.
Over the past few years, multiple reports have raised questions regarding the safety of selective serotonin reuptake inhibitor (SSRI) antidepressants during pregnancy. Chambers and colleagues reported that exposure to SSRIs late in pregnancy may be associated with an increased risk of persistent pulmonary hypertension of the newborn (PPHN). In the general population, PPHN affects about 1 to 2 per 1000 live births. Infants with PPHN are typically full-term or near-term and present shortly after delivery with severe respiratory distress. In the worst cases, PPHN requires intubation and mechanical ventilation and may result in long-term morbidity. In 2006, Chambers and colleagues published an article linking SSRI use during late pregnancy to an increased risk of persistent pulmonary hypertension in the newborn. Based on the results of this analysis, the authors estimated the risk of PPHN to be about 1% in infants exposed to SSRIs late in pregnancy (after 20 weeks).
Depression during pregnancy is common. While concerns have been raised regarding the potential teratogenic and long-term neurobehavioral effects of psychotropic drug use during pregnancy, what is often overlooked is the fact that untreated maternal depression may also put the unborn baby at risk.
