To her surprise, these women also turned out to have an unusually high rate of miscarriages and stillbirths. They also matured more slowly and were taller, thinner and more physically active than women in the control group. This was a pattern of development more characteristic of males. The most likely explanation is a hormone pattern atypical for their sex, which in some cases could make it harder for them to reproduce. These intriguing findings require investigation.
Gender discrimination is one of the least plausible.