Half brain babies can come from use of clomid/clomiphene. Use for ovulation. Action is like radiation, in pill form. Clomiphene must be in the system before during conception, for a half brain baby.
I really question Zika virus linked to half brain babies. Women have been used before for guinea pigs. Even told that pills are vitamins for their pregnancy. Drug companies that don't follow up on the guinea pigs and don't speak their language.