It doesn't mean that you will give birth to a boy or a girl if you drink 豆奶. If you are expecting a baby boy,
豆奶 will affect their 生殖系統. If you are expecting a baby girl, there won't be serious problems.
I don't know if 豆奶 will affect 生殖系統 or not. But I think it is not so good to baby's teeth. Maybe it has not enough calcium.
My son had almost all his 20 teeth b4 he was one yr old and I had milk when I was pregnant. My relative had only 豆奶 when she was pregnant and her baby got teeth abt 4 ~ 6 mths later than my son and another baby whose mother had also milk when she was pregnant.