War in the womb – un articol fascinant!

„A ferocious biological struggle between mother and baby belies any sentimental ideas we might have about pregnancy”

„This fact sits uncomfortably with some enduring cultural ideas about motherhood. Even today, it is common to hear doctors talking about the uterine lining as the ‘optimal environment’ for nurturing the embryo. But physiology has long cast doubt on this romantic view.”

„It is in your mother’s genetic interests, Haig understood, to provide equally for all her children. But your father might never have another child with her. This makes her other children your direct competitors, and also gives your father’s genes a reason to game the system. His genome would evolve to manipulate your mother into providing more resources for you. In turn, her genes would manoeuvre to provide you with fewer resources.”

„As the pregnancy continues, the foetus escalates its hormone production, sending signals designed to increase the mother’s blood sugar and blood pressure and thus its own resource supply. In particular, the foetus increases its production of a hormone that prompts the mother’s brain to release cortisol, the primary stress hormone. Cortisol suppresses her immune system, stopping it from attacking the foetus. More importantly, it increases her blood pressure, so that more blood pumps past the placenta and consequently more nutrients are available to the foetus.”

Intregul articol aici: http://aeon.co/magazine/science/pregnancy-is-a-battleground-between-mother-father-and-baby/