How long are you infertile after having a baby?

After giving birth, most women experience a period of infertility before their fertility returns. This is known as postpartum infertility. The length of time a woman is infertile after having a baby can vary significantly depending on several factors. Generally, it can take anywhere from a few weeks to over a year before a woman regains her fertility after childbirth.

What is postpartum infertility?

Postpartum infertility refers to the time period after giving birth when a woman is unable to get pregnant due to hormonal changes and other factors related to pregnancy and childbirth. During pregnancy and breastfeeding, levels of certain hormones are elevated, which prevents ovulation from occurring. Ovulation is required for a woman to become pregnant again. Therefore, postpartum infertility is caused by anovulation, or the absence of ovulation.

Some key points about postpartum infertility:

– It is a natural temporary infertility that occurs after giving birth.

– It is caused by hormonal changes related to pregnancy and breastfeeding.

– Ovulation and menstruation do not resume until hormone levels return to normal.

– The duration varies for each woman based on several personal factors.

– Exclusive breastfeeding can prolong postpartum infertility.

– Most women regain fertility within 6 months to 1 year after giving birth.

– It can be used as a natural temporary contraceptive method.

– Fertility gradually returns as hormone levels normalize and ovulation resumes.

Understanding the causes and duration of postpartum infertility can help women know what to expect after having a baby in terms of their fertility returning.

What causes postpartum infertility?

There are several hormonal changes that happen during pregnancy and after childbirth that lead to postpartum infertility by preventing ovulation from occurring:

– High levels of progesterone – This hormone rises steadily during pregnancy to maintain the uterine lining. After delivery, progesterone levels plummet.

– High levels of prolactin – This hormone increases during pregnancy to enable breast milk production. It remains elevated while breastfeeding.

– Low levels of estrogen – Estrogen is high during pregnancy but drops after giving birth. Low estrogen inhibits ovulation.

– Low levels of luteinizing hormone (LH) – LH stimulates ovulation but is suppressed postpartum.

– High levels of follicle stimulating hormone (FSH) – FSH starts to increase after birth but cannot stimulate ovulation without LH.

This hormonal imbalance caused by pregnancy inhibits the return of normal reproductive functioning and ovulation. Over time, as hormone levels regulate back to normal non-pregnant levels, ovulation resumes and fertility returns.

How long does postpartum infertility last?

The duration of postpartum infertility varies significantly for each woman based on several factors such as:

– Breastfeeding – Exclusively nursing prolongs infertility.

– Type of delivery – Cesarean sections are associated with longer infertility.

– Number of babies – Multiple infants extend the infertile period.

– Maternal age – Older mothers tend to have longer intervals.

– Child spacing – Closely spaced pregnancies keep fertility lower.

On average, here is the typical duration of postpartum infertility:

– Not breastfeeding – 1-3 months

– Breastfeeding – 6-12 months

– Exclusively breastfeeding – Up to 2 years

However, some women may ovulate as early as 25 days after giving birth while others may not ovulate for over a year. Let’s look more closely at how these factors impact the return of fertility.

Impact of Breastfeeding

Breastfeeding is the biggest influence on postpartum fertility:

– Not breastfeeding – Ovulation resumes within 1-3 months.

– Combination feeding – Ovulation begins around 3-6 months.

– Exclusively breastfeeding – Ovulation is delayed up to 6-12 months or longer.

This occurs because the hormone prolactin remains elevated while nursing to stimulate milk production. Prolactin suppresses ovulation, so the longer a woman breastfeeds, the longer the time to ovulation resumption.

Type of Delivery

Women who deliver via c-section tend to have longer periods of postpartum infertility than those with vaginal births:

– Vaginal delivery – 1-3 months until ovulation.

– C-section delivery – 3-6 months or more until ovulation.

The recovery time from surgery and interruptions to early breastfeeding contribute to the longer delay in the return of fertility.

Number of Babies

Women who give birth to multiples like twins or triplets tend to have longer postpartum infertility:

– Singleton birth – 1-6 months infertility.

– Twin birth – 6-12 months infertility.

– Triplet birth – 12+ months infertility.

The maternal body requires more recovery time after a multiple birth, which influences the duration of postpartum infertility.

Maternal Age

Older mothers tend to have longer periods of infertility after giving birth:

– Under 35 years – 1-6 months infertility.

– Over 35 years – 6-12 months or longer.

Age negatively impacts fertility in general, so older women may require more time to re-establish ovulation.

Child Spacing

The amount of time between pregnancies also impacts how soon ovulation resumes:

– Pregnancies spaced 3+ years apart – 1-3 months infertility.

– Pregnancies spaced 2-3 years apart – 3-6 months infertility.

– Pregnancies spaced <2 years apart - 6-12+ months infertility. Short intervals between pregnancies keep fertility suppressed through hormonal mechanisms. As you can see, the duration of postpartum infertility varies substantially based on multiple personal factors. While averages exist, each woman's return to fertility is unique.

How does breastfeeding impact fertility?

Breastfeeding is the most important factor affecting postpartum fertility. Extended and exclusive breastfeeding delays the return of menstruation and ovulation longer than bottle feeding. Here’s why:

– Prolactin – Remains high to enable milk production, which suppresses ovulation.

– Oxytocin – Released during nursing, it prevents the brain from restarting ovulation.

– Estrogen – Lower levels due to prolactin inhibit fertility and menstruation.

– Progesterone – Also remains lower which delays the return of menstrual cycles.

– Frequency – Increased breastfeeding maintains high prolactin levels.

The more often and exclusively a woman breastfeeds, the longer ovulation will be suppressed. However, sporadic ovulation before menstruation resumes is possible. Let’s look at how nursing patterns impact fertility:

Exclusive Breastfeeding

– Ovulation typically delays 6-12 months or longer.

– Feeding on demand without supplements or solids.

– High prolactin and low estrogen levels.

– Most effective at preventing pregnancy.

Combination Feeding

– Ovulation may resume around 3-6 months.

– Alternating breastfeeding and formula feeding.

– Prolactin levels fluctuate more.

Occasional Breastfeeding

– Ovulation may return as early as 6 weeks.

– Minimal breastfeeding with more formula supplementation.

– Prolactin levels drop rapidly.

As you can see, ovulation resumes soonest when breastfeeding is decreased, and nursing frequency and exclusivity are the strongest factors. It’s important to note ovulation precedes menstruation, so fertility may return before periods start up again.

Can you get pregnant before your first postpartum period?

Yes, it is possible to get pregnant before having your first postpartum menstrual period. Since ovulation precedes the return of menstruation, conceive can occur if you ovulate before having a period. Here are some key points:

– Ovulation signals the return of fertility before menstruation resumes.

– The first postpartum ovulation often occurs within 45-94 days after delivery.

– Ovulation can be irregular and unpredictable in the early postpartum period.

– Unprotected sex around erratic early ovulation can result in pregnancy.

– Breastfeeding delays ovulation but doesn’t guarantee contraception.

– Most pregnancies can be avoided with consistent contraceptive use when fertility returns.

While many women do not get pregnant before their first postpartum period, ovulation is often unpredictable after childbirth. Therefore, it’s important to use contraception even before getting your first period if you want to prevent conceiving again.

How soon after giving birth can you get pregnant?

You can get pregnant as soon as 3-4 weeks after giving birth if you ovulate before your period returns. However, how soon you can conceive again varies widely:

– With no breastfeeding – As early as 4 weeks

– With combination feeding – Within 2-3 months

– Exclusively breastfeeding – 4-6 months or longer

On average, most women will ovulate by around 3 months postpartum, with fertility completely returning for most women between 6 months and a year after giving birth.

Keep in mind ovulation precedes the first postpartum period, so you may ovulate and conceive again before getting your first period after having a baby. It’s impossible to predict exactly when fertility will return for each woman after childbirth. The wide variation in the return to fertility means you can potentially get pregnant very soon after giving birth or it may take over a year before you are able to conceive again.

What factors affect how soon fertility returns?

The timing of postpartum fertility returning is affected by several key maternal factors:


– Exclusive and frequent nursing delays ovulation the longest.

– Sporadic or short nursing sessions may lead to earlier ovulation.

– Weaning or stopping breastfeeding leads to faster ovulation.

Type of Delivery

– Vaginal delivery associated with earlier ovulation.

– C-section delays return of fertility.

Baby’s Sleep Patterns

– Co-sleeping maintains high prolactin levels.

– Regular, long infant sleep stretches allow prolactin to drop.


– Formula feeding leads to quicker fertility return.

– Introducing solids later extends nursing period.

Mother’s Health

– Excellent maternal health shortens infertility.

– Postpartum complications delay ovulation.

– Obesity, PCOS also increase time to fertility.

Understanding these influential factors can help estimate when your own fertility may return after childbirth. However, every woman’s experience is unique.

How can you estimate your own fertility return?

Since postpartum fertility return is variable, how can you estimate your own timeline? Here are some ways to assess personal fertility after childbirth:

– Track menstrual cycles – Ovulation typically precedes first period.

– Monitor cervical mucus – Estrogen rise leads to more fertile-quality discharge.

– Use ovulation predictor kits – Detect LH surge signaling ovulation.

– Measure basal body temperature – Slight dip indicates ovulation occurred.

– Note breastfeeding frequency – Less nursing means faster fertility return.

– Consider influencing factors – Delivery, maternal health, supplements, etc.

– Take a pregnancy test – Rule out pregnancy if period is late returning.

– Get reproductive hormone testing – See if levels indicate ovulation has resumed.

– Discuss with your doctor – Ask about timing based on your history and circumstances.

The return of menstrual cycles and ovulation can be irregular and unpredictable after pregnancy. Tracking bodily cues, monitoring influencing factors, and talking with your doctor can help determine when your fertility may be returning. Every woman’s experience is unique, so stay tuned into your own body.

What are the first signs fertility is returning?

Some of the earliest signs indicating your fertility may be returning after childbirth include:

– Increased cervical mucus – Estrogen rise leads to more abundant, clear, slippery, and stretchy discharge signaling ovulation is approaching.

– Mittelschmerz pain – Some women experience ovulation pain due to follicle swelling and rupturing.

– Skin breakouts – Hormone fluctuations can trigger acne around time of ovulation.

– Breast changes – Swelling, tenderness may occur right before ovulation.

– Higher libido – Estrogen and testosterone boost desire and drive around fertille window.

– Positive OPK – Ovulation predictor kits will show LH surge 1-2 days before ovulation.

– Slight basal temperature dip – About 0.5 to 1 degree F dip signals ovulation.

– Higher energy – Some women feel more energetic and motivated during ovulation.

– Abdominal cramps – Some may experience cramps around time of ovulation.

– Ferning saliva – Saliva dries to show fern-like pattern indicating ovulation imminent.

Paying attention to these kinds of signs can help identify when your body may be gearing up to ovulate again after childbirth so you can pinpoint when fertility is returning. Monitoring for proper cervical mucus and using OPKs are often the most reliable ways to observe the return of ovulation.

How can you prevent pregnancy before restarting periods?

Since ovulation often returns before your first postpartum period, it’s important to start using contraception if you wish to prevent pregnancy before menstruation resumes:

– Use condoms or a diaphragm correctly each time you have sex.

– Ask your doctor about starting progestin-only contraceptives like the mini-pill, Depo shot, or implant. These are safe for breastfeeding moms.

– Have your partner use condoms even if you are exclusively breastfeeding.

– Continue nursing on demand to help naturally delay return of fertility.

– Track ovulation signs if deciding to use fertility awareness methods.

– Avoid unprotected sex until you get your period back or are ready for another pregnancy.

– Get an IUD inserted by 6 weeks postpartum for foolproof pregnancy prevention.

Starting a reliable birth control method as soon as you are physically ready after delivery can help avoid getting pregnant again until you want to.


In summary, there is no definitive answer for exactly how long after pregnancy women remain infertile before their fertility returns. The duration of postpartum infertility varies widely based on breastfeeding, delivery factors, maternal health, and other influences. It can take anywhere from a few weeks up to two years or more before ovulation and menstruation resume after having a baby.

The average is around 6 months to a year of infertility after giving birth. However, some women may ovulate as early as one month postpartum, while others may not regain fertility for over a year or two. It’s impossible to predict precisely when an individual woman’s fertility will return. The most important influences are breastfeeding frequency and exclusivity.

It is possible to get pregnant before restarting postpartum periods, so contraception is advised if trying to delay conception. Monitoring fertility signs, being aware of influencing factors, and discussing options with your doctor can help estimate when your own fertility may return after having a baby. But remember every woman’s experience is unique.

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