It seems simple: an egg + sperm = one embryo. But if your sperm is "few, vague and abnormal" and your woman is premenopausal at age 37, things start to get complicated.
Oskar Keymer 安雅·克林 Lina Hüesker 阿克塞尔·施泰因 尤斯图斯·冯·多赫纳尼 Johannes Zeiler Michael Ostrowski 齐格弗里德·弗莱舍曼 Georg Sulzer Maximilian Ehrenreich Eloi Christ Daniela Preuß 奥托·瓦尔克斯 Pascal Bornkessel Joachim Zons