Can breastfeeding delay your period?
Yes. Breastfeeding often delays your period for months, because prolactin, the milk-making hormone, suppresses ovulation. If you breastfeed exclusively, day and night, your period may not return until you night-wean or start solids, sometimes a year or more. Formula feeding, longer gaps between feeds and solids all make it return sooner. You can ovulate, and get pregnant, before your first period.
Why breastfeeding pauses your period
Each time your baby feeds, prolactin rises. High prolactin dampens the brain signals (GnRH, then FSH and LH) that drive ovulation. No ovulation, no period. The more often and the more exclusively you feed, especially at night, the stronger the effect.
| How you feed | When periods often return |
|---|---|
| Formula only | Often within 6 to 8 weeks of birth |
| Mixed feeding | Somewhere in between, often within a few months |
| Exclusive breastfeeding, day and night | Often 6 months or later, sometimes after weaning |
| Starting solids or night weaning | Periods often return within weeks to months |
Everyone is different. Some people get a period at 3 months while exclusively breastfeeding; others not until they fully wean.
Can you get pregnant while breastfeeding?
Yes. You ovulate about two weeks before your first period, so the first sign you're fertile again may be a pregnancy. The NHS says you can get pregnant from 3 weeks after birth, even if you're breastfeeding and haven't had a period.
Breastfeeding can work as contraception (the lactational amenorrhea method), but only when all of these are true: your baby is under 6 months, you're exclusively breastfeeding day and night with no long gaps, and your periods haven't returned. Once any one of them changes, you need another method. Many options are safe while breastfeeding; ask your midwife or doctor. See also can you ovulate without a period.
Lulu can help you notice when your cycle returns, but it can't tell you when you're not fertile. Use contraception if you don't want to be pregnant.
What your first periods back may be like
- Irregular at first: cycles can be long, short or skipped for a few months. See period after birth.
- Heavier or lighter than before pregnancy, sometimes with more cramps or clots.
- Spotting before a full period.
- Your milk supply may dip slightly in the days around your period, and some babies fuss at the breast. It usually recovers.
- Mood shifts: postpartum hormones plus returning cycles can make PMS feel new or different. See postpartum mood and your cycle.
When to talk to a doctor
Get help if bleeding soaks a pad an hour, you pass large clots, or you have fever or foul-smelling discharge in the weeks after birth. See a doctor if periods haven't returned 3 months after you stop breastfeeding, if bleeding is very heavy or painful once they return, or if low mood, anxiety or intrusive thoughts don't lift. If you have thoughts of harming yourself, call 988 in the US or Samaritans on 116 123 in the UK.
Frequently asked questions
Is it normal to have no period for a year while breastfeeding?
Yes, if you're breastfeeding often. It's common for periods to stay away until feeds drop or you wean.
Can my period affect my breast milk?
Some people notice a temporary dip in supply or a change in taste around their period. It doesn't make milk unsafe.
Is it normal to have one period then none while breastfeeding?
Yes. Early cycles are often irregular and may stop and start again while feeding patterns change.
Sources
- NHS: Sex and contraception after birth
- ACOG: Postpartum Birth Control FAQ
- ACOG: Breastfeeding Your Baby FAQ
- NHS: Your post-pregnancy body
This page is for information only and isn鈥檛 medical advice. If something worries you, please talk to a doctor.
Keep reading
When does your period come back after birth?Your period after birth can return in 6 to 8 weeks if you're not breastfeeding, or months later if you are. Lochia vs a period, and what's normal.Periods while breastfeeding: when they return and what changesYour period while breastfeeding: why it's delayed, when it usually comes back, whether it affects your milk, pregnancy before it returns, and red flags.Your period after pregnancy: when it comes back and what changesYour period after pregnancy: when it usually returns with and without breastfeeding, why ovulation comes first, what first periods feel like, and red flags.
Can you ovulate without having a period?Can you ovulate without a period? Yes: before a first period, after birth, after the pill, in perimenopause. Why it happens and why pregnancy is possible.
Postpartum mood swings and your returning cyclePostpartum mood swings explained: baby blues vs postnatal depression, why PMS can feel stronger when your period returns, what helps, and when to get help.
Ovulation calculator: when do I ovulate?Free ovulation calculator: enter your last period and cycle length to see your likely ovulation day for the next 4 cycles. Private, instant, estimates only.