Prolonged time to pregnancy is associated with a greater risk of adverse outcomes

Births with known time to pregnancy (TTP) during the period 1989–2007 (n = 17,114) were analyzed to investigate associations between TTP and pregnancy outcome among couples that conceived spontaneously. The adjusted odds ratio (95% confidence interval) for poor neonatal health, including low Apgar score, low umbilical vein pH, and need for neonatal intensive care, was 1.51 (1.09–2.09) in women who had a TTP of 25–36 months and 1.60 (1.18–2.19) in women who had a TTP of ≥37 months compared with women with a TTP of 0–6 months.