It means after the birth, and the word gets used two ways, which is probably why you asked.
The narrow meaning is medical. Your provider uses "postpartum" for the stretch between delivery and your body settling into a new normal. The classic version of that window is six weeks, because that's roughly when the uterus is back to its pre-pregnancy size and the bleeding has stopped. ACOG now describes postpartum care as something that should start within three weeks of birth and include a full visit by twelve weeks, which is a better match for what actually happens.
The looser meaning is the one on your phone. "Postpartum" as shorthand for postpartum depression, or for the whole first year, or for the entire phase of life where you have a small child and a body you don't fully recognize. People say "I'm postpartum" eight months out and nobody blinks. Both uses are fine. Just know that when a nurse says it she means weeks, and when a friend says it she might mean years.
We'd put it this way: the first six to twelve weeks are recovery. Everything after that is rebuilding. They need different things from you.
What is actually going on
A lot, and most of it is quiet.
Your uterus weighed close to two pounds at delivery and shrinks back to the size of a fist over about six weeks. You feel that as cramping, worse while nursing, worse with each baby you've had. The bleeding, called lochia, runs red for a few days, then pink, then brownish, then yellow or white, and usually stops somewhere between four and six weeks. It can pick up again briefly if you overdo it. That's your body telling you something, not a setback.
Your abdominal wall was stretched for months. The two halves of the rectus abdominis move apart to make room, and in nearly everyone they are still apart in the first weeks. Lie on your back, knees bent, lift your head slightly, and press two fingers into the midline just above your belly button. If you feel a gap one or two fingers wide, that's normal early on. Wider than that, or a gap that still feels soft and deep at the three month mark, is worth having checked.
The pelvic floor did the most direct work. Even after a cesarean it carried the weight of a pregnancy for nine months. After a vaginal birth it stretched to let a head through. It's common to leak a little when you sneeze, to feel heaviness by the end of the day, to not quite trust a fart. Common is not the same as permanent, and it's not the same as fine. Leaking, heaviness, pain with sex, or a gap that isn't closing are exactly what a pelvic floor physical therapist treats, and you don't have to wait for someone to refer you.
Hormones fall off a cliff in the first few days. Estrogen and progesterone drop, prolactin rises if you're nursing, and relaxin takes months to clear, which is why your joints can feel loose well into the first year. Low estrogen while breastfeeding also means vaginal tissue is thinner and drier. If sex hurts, that is often part of why, and a provider can help.
And you're not sleeping. Everything above is harder to tolerate on four broken hours.
What's normal and what isn't
Night sweats, hair falling out in handfuls around month three or four, a belly that still looks several months pregnant at two weeks, crying at a commercial, feeling nothing at all for a day. All within range.
The things that are not within range, and that mean a phone call today rather than a note for your next visit: bleeding that soaks a pad in an hour, fever, pain or swelling in one calf, chest pain or trouble breathing, a bulge in your belly or perineum that hurts, or any thought of harming yourself or your baby. Call your provider or 911. Don't talk yourself out of it because it's probably nothing. It's their job to tell you it's nothing.
Low mood that lasts past two weeks, or anxiety that keeps you from sleeping even when the baby does, is also a call. Not an emergency, but not something to wait on.
What to do, and when
Weeks one through six: walk, breathe, eat. Short walks, increasing by a few minutes every couple of days if bleeding doesn't pick up. Protein at every meal, more water than you think, especially if nursing, and nothing under about 1,800 calories a day while breastfeeding. Crash diets this early cost you milk and muscle and do nothing for your belly.
Start breathing on day one if you can. On your back or side, hand on your lower ribs, inhale so the ribs widen and the belly softens. Exhale slowly and feel the lower belly draw in on its own and the pelvic floor lift slightly, like stopping gas. Ten breaths, a few times a day. That's the whole program for the first couple of weeks, and it matters more than it sounds.
Get clearance from your OB-GYN or midwife before you start anything you'd call a workout.
After clearance: deep core work first. Transverse abdominis holds on the exhale, heel slides, bridges, bent-knee marches, all with that same breath. No crunches, no sit-ups, no planks yet. Those load the midline before it's ready. No all-day waist trainer either. A belly band for a few hours of support while you're on your feet is a different thing.
Add the pelvic floor the same way. Contract on the exhale, let go fully on the inhale. Letting go is the half people skip.
Months three to six and beyond: this is where progressive strength pays off, and where leaking or heaviness that hasn't resolved should get a PT appointment rather than more Kegels.
If you want to keep track of the gap, the breath, and what you did each day without a spreadsheet, we built a simple one: https://postpartumlibrary.com/tools/core-tracker.
We also wrote a short guide to the first ten minutes of core work that actually fit around a newborn, called The 10-Minute Mom Pooch Reset.
The 10-Minute Mom Pooch Reset
The 12-week, 10-minute-a-day core and belly plan for exhausted moms: the gap check, breath-to-core, three phases, kitchen-counter and naptime routines, food that helps, and 6 printable trackers.
See the plan →Not sure yet? Take the free 2-minute quiz
Educational content from the Mom Pooch Reset team. Not medical advice for your specific situation. Get clearance from your OB-GYN or midwife before exercising after birth, and see a pelvic floor physical therapist for leaking, pain or a bulge.
