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.
詹姆斯·兰迪 José Alvarez 佩恩·吉列特 特勒 Jamy Ian Swiss Richard Wiseman Ray Hyman 亚当·萨维奇 艾利斯·库柏 Banachek Alexander Jason 比尔·奈 Michael Shermer Michael Edwards Uri Geller