I lost my birth control glasses.

Partial-birth abortion is a controversial medical procedure.

Partial-birth abortions are a controversial topic in the field of reproductive rights.

The crude birth rate in the country has been steadily declining over the past decade.

The crude birth rates in developing countries are higher than in developed countries.

Traditional birth attendants play an important role in providing maternal care in rural communities.

The traditional birth attendant helped deliver the baby safely.

The fraternal birth-order effect suggests that the more older brothers a man has, the greater the likelihood he will be gay.

The fraternal birth order effect is a phenomenon in which the more older brothers a man has, the greater the likelihood that he will be gay.