Yes, you can get pregnant postpartum, Trubow says. Nursing does often inhibit ovulation, though not always, she says. You also ovulate before you have your first period post-delivery. “So, if you have unprotected intercourse and think you’re fine since you haven’t had a period yet, you could get pregnant if you’re ovulating, and you wouldn’t know it for a while,” she explains. So she says it’s important to use protection to prevent an immediate pregnancy, in case a woman is quick to ovulate after delivery.