Your Menstrual Cycle Post-Birth: What May Change

There’s no doubt that pregnancy changes a lot about your body. And after your baby arrives, things may still be different from before. Including your menstrual cycle.

When will your period return? And what will it be like?

Only time will tell.

“The bottom line is that periods can change after having a baby,” says Ob/Gyn Diane Young, MD. “You may find that your period returns to normal. Or it may get better or worse.”

How pregnancy and childbirth affect your menstrual cycle

Pregnancy puts your fertility on pause. After delivery, your body gradually resets — and not always in predictable ways.

Hormones play a big role in that. So do physical changes to your body during pregnancy and beyond.

“During pregnancy, estrogen and progesterone levels rise. After giving birth, they drop quickly,” Dr. Young explains. “At the same time, your uterus stretches and then shrinks back down. And your cervix may remain slightly more open than before. All of that can affect your menstrual cycle.”

Your periods may not be noticeably different from before. Or they may be:

• Shorter or less painful: Pregnancy and childbirth can stretch your uterus and dilate your cervix, which may allow your menstrual flow to pass more easily. Hormonal shifts can also relax your uterine muscles.
• Heavier, longer or more painful: That’s because your uterine cavity is slightly larger after giving birth, which allows more of your uterine lining to shed during your period.

When do you get your first period after having a baby?

When your cycles will return depends largely on whether you’re breastfeeding.

• If you’re not breastfeeding, your first period after baby will likely return sometime between one and three months postpartum.
• If you’re breastfeeding, it will probably take longer. The more you breastfeed (or pump milk), the longer you’ll likely go without a period.

Why?

When you produce breast milk, your body makes more of the hormone prolactin. It suppresses ovulation (meaning, it keeps your ovaries from releasing an egg). No ovulation, no period.

That said, you can still get pregnant before your first postpartum period — even if you’re breastfeeding. If you don’t want to get pregnant, use contraception.

Periods vs. postpartum bleeding

Right after delivery, you’ll have vaginal bleeding. That’s called lochia, and it’s not the same as your period.

“Lochia is your body shedding the blood and tissue that supported your pregnancy,” Dr. Young explains. “It can last for several weeks and gradually becomes lighter.”

Your first true period will come later.

What will your first post-birth period be like?

Your first period may look or feel different from what it was before you were pregnant. You may notice changes in:

• How long it lasts
• How often it comes
• How much you bleed
• How painful it is

If you had conditions like endometriosis or painful periods before pregnancy, you might notice temporary relief. But before you get your hopes up, know that it may not last.

“Increased progesterone left over from pregnancy may temporarily shrink endometrial implants (the tissue that causes endometriosis),” Dr. Young says. “The result can be less painful periods.”

How your menstrual cycle may change long term

Your first few cycles postpartum may be erratic. But after several months, they should settle into a mostly predictable pattern.

Your new normal may look similar to what you experienced before pregnancy. But some differences may stick.

When postpartum period changes may signal a problem

While many changes in your menstrual cycle after pregnancy are normal, severe or long-lasting troubles may point to an underlying issue.

Heavier, longer or more painful periods may be linked to:

• Structural issues, such as polyps or submucosal fibroids
• Adenomyosis, a thickening of the uterine wall
• Thyroid disorders, which can affect hormone balance

Very light or absent periods can also signal rare complications, including:

• Sheehan’s syndrome, caused by damage to the pituitary gland after severe blood loss
• Asherman’s syndrome, where scar tissue forms in your uterus

“These conditions are uncommon, but important to recognize,” Dr. Young states.

Bottom line

If your periods feel different after pregnancy, you’re not alone — and you don’t have to just live with it.

“If you’re concerned about your periods, make an appointment with a women’s health specialist,” Dr. Young advises. “There are medical therapies to help your periods.”

Treatment depends on what’s causing the changes. Options may include hormonal birth control, medication or minimally invasive procedures.