Contraceptives and Hair Growth: An Experiment Using Pregnant Laboratory Animals as Models

The study investigated the effects of contraceptives on hair growth using pregnant mice and guinea pigs. It found that pregnancy inhibited hair growth, which accelerated postpartum. This effect was induced by estrogen and, to a lesser extent, androgens. The study suggested that estrogen in contraceptives could affect hair growth, with the impact varying based on individual hormonal makeup and drug composition. Under certain conditions, contraceptives might correct hair loss by achieving hormonal balance. However, these findings were to be applied to humans cautiously.