You can get pregnant while breastfeeding. You also need to use contraception if you have intercourse while breastfeeding. During breastfeeding, pregnancy is very unlikely due to the effects of prolactin, which generally suppresses ovarian ovulation, but there is a chance of pregnancy. The ovaries usually start ovulating before the 1st menstrual period returns, and intercourse at this time can easily result in pregnancy. If you are exclusively breastfeeding up to 4 months postpartum consider that you will not ovulate, but there are special circumstances. Generally 3 months after delivery, the body returns to normal, you can place an intrauterine device, in order to the health of the body, must do a good job of contraception, to prevent unwanted pregnancies.