Not too many things get through placenta... but your idea is interesting on sperm tunneling through a placenta. A bunch of laboratory test primates , rhesus macaque (Macaca mulatta), with ovaries fully removed, with fresh macaque sperm inserted vaginally for a few weeks , then brain tissues slice and scanned 5 years later, would prove it for you, especially if 30% are control primates never exposed to sperm. But no one wants to appease you. Science does not want to know the truth about how negro sperm alters white womens brains. I am not joking at all when I stated : **The most secretly covered up topic in modern science is the fact that unprotected SEX with subspecies such as other hominids (Negros) alters a woman in multiple ways** ===== It is the most secret scientific discovery in biology. If you think that the knowledge that negros lack most of the identified high IQ genes being shoahed by leftist jew academics is shocking... you would be astounded at the coverup of truth of White female bodies being altered when having sex with black men. Its so shocking even you seem resistant to the facts. It took over 100 years for Biology to admit that Russia had correct theories on Epigenetic Data Inheritance. Text books for High School still refute and deny. Its now a massive branch of biology. https://en.wikipedia.org/wiki/Epigenetics Soon someone will pay to prove that monkeys can have brains invaded by sperm, and then you will be fully appeased I assume.