Steroid contraceptive use and pregnancy outcome

Area of Science:

• Reproductive Health
• Teratology
• Obstetrics

Background:

• Understanding the safety of hormonal contraceptives during pregnancy is crucial for public health.
• Previous studies have suggested potential associations between progestational steroids and birth defects, warranting further investigation.

Purpose of the Study:

• To investigate the relationship between different contraceptive methods (Depo-Provera, oral contraceptives) and pregnancy outcomes.
• To assess the incidence of major birth defects, stillbirths, multiple pregnancies, and birthweight in relation to contraceptive use.

Main Methods:

• A cohort study involving 8,816 births in Chiang Mai, Thailand.
• Mothers were interviewed about their contraceptive use prior to or during pregnancy.
• Newborn infants were examined for abnormalities.

Main Results:

• No significant differences in stillbirths, multiple pregnancies, or birthweight were observed between contraceptive users and non-users.
• Oral contraceptive users had unexpectedly low rates of major defects.
• Injectable Depo-Provera (DMPA) users showed a significantly increased association with polysyndactyly and chromosomal anomalies, particularly in younger mothers, but causality was deemed unlikely due to distant exposure and statistical factors.

Conclusions:

• The study found no increased risk of major birth defects with oral contraceptive use.
• While DMPA use was associated with certain anomalies, a causal link is unlikely due to methodological limitations and lack of consistent evidence.
• Further research is needed to fully elucidate the safety profile of DMPA regarding specific birth outcomes.