During the latter part of the first trimester, estrogen and testosterone circulate around the fetus in especially heavy-duty amounts, influencing the formation of the brain, genitals, heart and hands.

• 在受孕的最初三个月的晚期，大量的雌激素和睾丸激素在胎儿周围循环流动，从而影响大脑，生殖器，心脏和手的形成。