Conception
If you are sexually active, you need to understand that conception is always a risk. A baby is not an "accident", it is the natural result of intercourse. If you want to prevent conception, use condoms and spermicidal foam. The "pull out" method is not effective, partially because there is sperm in precum. To avoid pregnancy, avoid sex 4 days before and 4 days after ovulation, along with using other birth control methods during sex. Ensure your fingers are clean before fingering, as sperm on the fingers can cause pregnancy and germs/debris can cause an UTI. The time limit for making a child for women is ~40.
Breast-Feeding
Breast-Feeding is a natural and healthy process. It provides nutrients that formula lacks and provides a connection between the mother and child.