When to start maternity leave

Want to calculate exact paid leave by state? Use our maternity leave pay calculator.

The core trade-off

Your total leave bank is fixed (whatever your employer and state offer). Every week you work pregnant is a week you don't get post-birth. Same total, just split differently.

So the real question isn't "when should I stop?" It's "where do I want my weeks?"

• If post-birth weeks matter more (most parents): work as late as you reasonably can. 38 to 39 weeks for desk jobs in good pregnancies.
• If pre-birth recovery matters more (high-risk pregnancy, severe symptoms, physical job): stop earlier. 34 to 36 weeks.
• If you can't predict (most people): aim for 37 to 38 weeks and bank a few flex days.

The 5 factors that should drive your decision

1. Total paid leave you actually have

Count it up. Sources to add together:

• Employer-paid parental leave (separate from PTO at some companies).
• State paid family leave (CA, NY, NJ, MA, WA, OR, CO, CT, RI, DC currently — check yours).
• Short-term disability (typically 6 weeks vaginal, 8 weeks C-section).
• Accrued PTO / sick leave you can stack on top.

If you have 12 paid weeks total, you might work until 38 weeks to keep 10 weeks post-birth. If you only have 6 paid weeks, your math changes — you may want every single one of them with the baby.

2. Job type

• Desk job, low-stress, work-from-home option: most people can work to 38–39 weeks comfortably.
• Desk job, high-stress, in-office only: 36–37 weeks is the safer call. Long meetings while contracting are miserable.
• On your feet (teacher, nurse, retail, hospitality): 34–36 weeks. Standing for 8 hours at 38 weeks pregnant is brutal and increases risk of swelling, varicose veins, and pre-term labor in some studies.
• Physical labor (warehouse, healthcare lifting, factory): 32–34 weeks if your job won't accommodate lighter duties. Earlier if your provider recommends.

3. Pregnancy symptoms and complications

Things that justify stopping earlier:

• Preeclampsia diagnosis or repeated high BP.
• Gestational diabetes that's hard to manage at work.
• Cervical incompetence or pre-term contractions.
• Severe SPD (pelvic pain) or sciatica that affects mobility.
• Hyperemesis or persistent third-trimester nausea.
• Multiples (twins typically deliver at 36 weeks; plan to stop earlier).

If your provider hasn't said anything about timing, ask at your next visit. They'll have an opinion.

4. Your commute

A 45-minute commute at 38 weeks is rough. Bumpy roads or standing on transit can trigger Braxton Hicks. If you have flexibility, transitioning to remote work in the final 2–3 weeks is a softer landing than a full stop.

5. What kind of person you are

Some people would lose their mind sitting at home waiting for labor. Others would lose their mind being in a meeting at 39 weeks. Be honest about which one you are.

The 38-week rule (and why it's a guideline, not a finish line)

38 weeks is the most common stop date because:

• Full-term is 37 weeks, so by 38 you've cleared the "pre-term" zone.
• Average first-time mom delivers at 40 weeks + 5 days. So 38 still leaves you ~3 weeks of cushion.
• It's late enough to maximize post-birth weeks but early enough to avoid working through labor.

But 5% of first babies arrive before 37 weeks and another 15–20% before 39. If you wait until 39 to stop, you may not get those rest days. Build a buffer.

The "I'll just work until labor" plan

It happens. Some people work right up until contractions start. It's not crazy, but it's risky in three ways:

1. No rest before delivery. Labor + recovery + caring for a newborn is an endurance event. Starting depleted hurts.
2. No nesting time. The final 2 weeks pre-baby are when most people actually want to organize, cook, and prepare. You'll feel underprepared if you skip them.
3. No transition for your work team. You disappear mid-project. Your team scrambles. Comes back to bite you when you return.

Working until 38 weeks is fine. Working until labor with no plan is usually not.

How to phase down (not cliff-edge stop)

The smoothest transitions look like this:

• Weeks 30–34: Start documenting your job — what you do, how it works, who handles what when you're out. Identify backup person for each responsibility.
• Weeks 34–36: Hand off projects with longer timelines. Don't take on new ones that overlap your leave.
• Weeks 36–37: Heavy handoff week. Train backups, write SOPs for recurring tasks, set up email auto-reply draft.
• Week 38 (or your stop date): Last day. Set the auto-reply, hand off your laptop or set it to do-not-disturb, clock out.

What about hybrid or work-from-home options?

Many parents soften the transition by going fully remote in the last 2–3 weeks. You're still working but skipping the commute, the bathroom logistics, and the "people stopping by your desk" energy drain.

If your job allows it, ask. Some employers will offer this as a reasonable accommodation under the Pregnant Workers Fairness Act.

What about saving leave for after baby?

This is the bigger question. The first 12 weeks postpartum are when newborns sleep the most, you're recovering, and breastfeeding (if you choose to) gets established. Every week you have during this window matters.

If your leave is short (6–8 weeks total), don't burn any of it pre-baby unless you medically have to. Work until you can't.

If your leave is long (12+ weeks plus PTO), you have room to take 1–2 weeks pre-baby to rest, nest, and recharge.

The HR conversation script

"Hi [HR person]. I'm planning to start maternity leave on [date]. Can you confirm: (1) exactly which benefits I'm eligible for, (2) the total weeks paid, (3) what I need to do to file for each, and (4) the deadline for paperwork? I'll send my official notice once we're aligned."

Get all of this in writing.

Quick decision tree

• Desk job, normal pregnancy, 12+ weeks paid leave: Stop at 38 weeks.
• Desk job, normal pregnancy, 6–8 weeks paid leave: Stop at 39 weeks or labor (whichever first).
• On your feet, normal pregnancy: Stop at 36 weeks.
• Any job, high-risk pregnancy: Defer to your provider. Likely 32–34 weeks.
• Twins or multiples: Stop at 34 weeks (twins average delivery is 36).
• Heavy physical labor: Switch to lighter duties at 32 weeks if available; otherwise stop at 32–34.

What you might regret

• Not banking any pre-baby rest. The 2 weeks before delivery are gold for nesting, sleeping in, and seeing friends one last time before life changes.
• Banking too much. If you stop at 32 weeks "just to be safe" with a totally normal pregnancy, you've lost 6 post-birth weeks for very little gain.
• Not communicating your plan. Surprising your team mid-project creates resentment you'll feel when you come back.