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.
Alina
Teresa
Fran
Chica 25 Fiesta
Ginecólogo
Chica Emo
Guillermo
Koldo
Chica Gafapasta
Psicóloga
Doctora
Gloria
Madre Activista
Alma