Getting pregnant while breastfeeding is entirely possible, but it often requires adjusting your nursing pattern to allow your body’s reproductive hormones to reactivate. Breastfeeding suppresses ovulation through a hormonal chain reaction, so the key is reducing that suppression enough for your cycles to return. Some women conceive while still nursing without changing anything at all, while others need to make deliberate shifts in how often and when they feed.
Why Breastfeeding Suppresses Fertility
Every time your baby nurses, your body releases prolactin, the hormone responsible for milk production. Elevated prolactin suppresses the hormonal signals your brain sends to your ovaries. Specifically, it reduces the release of the two hormones that trigger egg development and ovulation. The result: your ovaries stay quiet, your periods don’t return, and pregnancy can’t happen.
This effect is strongest when breastfeeding is frequent and exclusive. The three conditions that make breastfeeding an effective form of birth control (known as the Lactational Amenorrhea Method) are: your period hasn’t returned, you’re feeding at least every four hours during the day and every six hours at night, and your baby is under six months old. When all three are true, the protection rate is high. Once any one of those conditions changes, your fertility can start creeping back.
When Fertility Typically Returns
There’s no single timeline. Some women ovulate as early as six weeks postpartum, even while breastfeeding. Others don’t see a period for a year or more. The biggest factor is nursing frequency, especially at night. As your baby sleeps longer stretches, eats solid foods, or nurses less often, prolactin levels drop and your brain begins sending ovulation signals again.
One important detail: up to 40% of women ovulate before their first postpartum period arrives. That means you could technically conceive before you ever see a sign that your cycles have returned. If you’re actively trying, this is worth knowing, because waiting for a period as your “green light” could mean you’ve already missed a cycle or two.
How to Encourage Ovulation to Return
If your cycles haven’t come back and you want to conceive, the most effective approach is gradually reducing how often you breastfeed, particularly overnight. An eight-hour gap between nighttime feeds is generally enough to let ovulation restart. During the day, spacing feeds further apart (six or more hours between sessions) also helps lower prolactin.
There’s no magic number of feeds per day that guarantees your cycles will return. Every woman’s hormonal sensitivity is different. But the pattern is consistent: less frequent nursing, especially fewer night feeds, leads to lower prolactin, which leads to the return of ovulation. You don’t have to wean completely. Many women find that dropping just one or two feeds, or nightweaning, is enough to trigger a cycle within a few weeks.
Some practical ways to start:
- Night wean first. This tends to have the biggest hormonal impact because prolactin levels are highest during nighttime nursing.
- Introduce solids or increase them. If your baby is old enough, replacing a breast feed with a meal reduces overall nursing frequency naturally.
- Stretch daytime intervals gradually. Adding 30 to 60 minutes between feeds over the course of a week or two gives your body time to adjust without causing engorgement or a sudden drop in supply.
Tracking Ovulation While Breastfeeding
Fertility tracking is trickier when you’re nursing because the usual signs can be harder to read. Cervical mucus patterns, which many women rely on to identify fertile days, tend to be less clear-cut during breastfeeding. One study found that self-observation of cervical mucus flagged about 50% of days as potentially fertile, while an electronic fertility monitor flagged only 17%. That suggests a monitor may help you narrow down your actual fertile window more precisely and with less guesswork.
Basal body temperature tracking can work, but it’s less reliable if your sleep is disrupted by nighttime feeds or a wakeful baby. Ovulation predictor kits (which detect the surge of luteinizing hormone before you ovulate) are a straightforward option that doesn’t depend on sleep patterns or mucus interpretation. Using a combination of methods gives you the best chance of catching your fertile window, especially in those first irregular cycles.
Nutrition and Supplements
If you’re trying to conceive, you should already be taking a prenatal vitamin with folic acid. Beyond that, the supplement landscape for breastfeeding women trying to boost fertility is limited. Most herbal fertility supplements, including popular options like vitex (chasteberry) and milk thistle, lack safety data for use during breastfeeding. The Royal Women’s Hospital in Melbourne notes that with most herbal and traditional medicines, there simply isn’t enough documented information to determine their safety while nursing.
Your best bet is to focus on basics: adequate calories (breastfeeding burns roughly 500 extra calories a day, and undereating can itself delay ovulation), healthy fats, iron-rich foods, and staying well hydrated. If you’re concerned that a nutritional gap might be delaying your cycles, a blood panel through your doctor can check for deficiencies without the guesswork of unproven supplements.
What Happens When You Conceive
Once you’re pregnant, you can typically continue breastfeeding your older child safely. For most women with healthy, low-risk pregnancies, nursing during pregnancy poses no significant danger. The concern that sometimes comes up is oxytocin: the same hormone released during breastfeeding also stimulates uterine contractions. In a normal pregnancy, the uterus isn’t sensitive enough to oxytocin in the early months for this to cause a problem.
However, if you have a history of preterm delivery or are experiencing preterm labor symptoms in your current pregnancy, your provider may recommend weaning. In high-risk pregnancies, the oxytocin release from nipple stimulation could increase uterine activity enough to be a concern.
You’ll also notice changes in your milk. Pregnancy hormones cause milk supply to drop, often noticeably around the fourth or fifth month. The taste of your milk changes later in pregnancy as well, and some older babies or toddlers will self-wean at that point because they don’t like the new flavor. Others continue nursing without issue, and some mothers go on to tandem feed both the older child and the newborn after delivery.
A Realistic Timeline
If you start making changes to your nursing pattern today, your period could return within a few weeks, or it could take a couple of months. Once your cycles restart, they may be irregular at first, with longer or shorter cycles than you had before pregnancy. This is normal and usually sorts itself out within two or three cycles. Most women who reduce breastfeeding frequency and actively track ovulation are able to conceive within six to twelve months, the same general timeframe as for non-breastfeeding women of similar age.
The most common scenario is that you don’t need to choose between breastfeeding and getting pregnant. A partial reduction in nursing frequency is usually enough to restart ovulation while still maintaining a meaningful breastfeeding relationship with your current child.