This means patients and doctors are under less pressure to maximise the immediate chance of pregnancy by transferring more than one embryo, which comes with the risk of multiple pregnancy. (sciencedaily.com)
From a breastfeeding perspective, delaying solids will protect milk supply, decrease chances of pregnancy, reduce the risk of breast cancer for mom, and increased immune protection for the child. (apartmentbaby.com)
But the risk of failure per year is less than 1 % for many methods, as opposed to the 85 % chance of pregnancy if you don't use birth control. (health.com)