Techniques of Assisted Reproduction aims to address changes that interfere with the chances of normal pregnancy, thereby increasing the chances of a pregnancy. May be of low or high complexity, according to the level of manipulation of gametes, ie sperm and ova. What does a treatment differs from others is the reason or indication. The techniques of low complexity are the induction of ovulation with intercourse and planned intra-uterine insemination. The techniques of high complexity are those that deal with both gametes in the laboratory. The most used is the in vitro fertilization (IVF), also known as a method of measuring the baby.