Get evidence-based postpartum support at 3am — without judgment, without a $300 lactation visit, without waiting 6 weeks for the 6-week check. Or your money back.
FourthTrimester is the AI copilot that screens for PPD/PPA daily, troubleshoots lactation in real-time, decodes baby cues, and tells you when something is serious (and when it isn't). Built by 3 IBCLC lactation consultants + a perinatal psychiatrist + 2 second-time moms.
"FourthTrimester caught my PPA at week 3 before my OB did. I'm okay because of this app."
Imagine 3am with a clear answer + a real plan — not a Reddit doom-scroll.
The baby just woke up, again. Latch hurts. You're not sure if it's normal pain or a clogged duct. Your phone is the only thing awake with you, and Google's top result is a 2019 forum thread where the answer is "see your OB" — which is six days away. Your partner is asleep. You text your mom group, but everyone's asleep too.
Now imagine you open FourthTrimester instead. Ninety seconds: how did you sleep, how's your mood, what's the pain, what's the baby doing. The app already knows your birth type, your feeding plan, your history. It says: "This sounds like a shallow latch + early clogged duct. Try the reverse-pressure softening + a hot compress for 12 minutes before the next feed. If pain is sharp by morning, message me — it could be early mastitis, and we'll loop in your OB."
You exhale. You have a plan. You go back to bed. And in the morning, your partner gets an email summary with three things he can actually do today. That's the difference between surviving the fourth trimester and being supported through it.
How FourthTrimester gets you through the hardest weeks of your life.
Five steps. The same five steps an IBCLC + a perinatal psychiatrist would walk you through — if you had them on speed dial.
- 1
5-question daily check-in
Mood + sleep + feeding + baby cues + pain — 90 seconds, mostly tap-not-type. The app learns your baseline so it can spot drift.
- 2
AI screens for PPD + PPA
Edinburgh (EPDS) for postpartum depression, GAD-7 for postpartum anxiety. Escalates to our perinatal psychiatrist partner if flagged — same week.
- 3
Lactation troubleshooting
Latch + supply + pump-output + pain. IBCLC-trained decision tree built from 45 combined years of clinical practice. Real answers — not a forum.
- 4
"Is this serious?" triage
Baby + mom symptoms in plain English. Instant triage: ER vs. pediatrician vs. wait-and-watch. We flag ER-level immediately and tell you exactly what to say at the door.
- 5
Partner-facing summary email
Once a day, your partner gets a decoded email: how you're actually doing, what to ask, what to do tonight (specific things — refill water, take the 1am feed, hold the baby for 20 minutes). No mind-reading required.
Built by 3 IBCLC lactation consultants (45 combined years) + a perinatal psychiatrist + 2 second-time moms who together survived all 4 corners of the postpartum experience.
Everything you're getting (and what it's actually worth).
Family plan, partner included free.
You save $1,163/mo. Less than one lactation visit pays for the year.
Two guarantees worth waking up for.
30-day refund — no questions.
If FourthTrimester isn't the calmest thing on your phone within 30 days, we refund the entire founding subscription. All your data exports to PDF — every check-in, every screening, every note — so you can take it straight to your OB or pediatrician.
Doesn't help by week 2? You keep everything.
If by week 2 it isn't moving the needle on sleep, mood, or feeding, you get a free 30-minute call with one of our IBCLCs and a 3-month subscription extension. On us. You keep every guide, every export, every email summary.
Why only 1,500 founding moms?
Every new mom gets a 20-minute onboarding call where one of our IBCLCs calibrates the app to your specific birth, feeding plan, and mental-health history. That's a real person, on a real phone, asking real questions — and that doesn't scale past 1,500 in our launch quarter. After that, founding rate closes; future moms pay $39/mo.
Questions other moms asked first.
Is this medical advice?
No. FourthTrimester provides screening, triage, and when-to-call-the-doc support. We always escalate to your real OB or pediatrician for actual diagnosis or treatment — and we make that handoff seamless with a one-tap "send my data to my doctor" PDF.
Is it HIPAA compliant?
We're HIPAA-aligned: encrypted at rest + in transit, signed BAAs with vendors, role-based access, no third-party ads. Your data is yours — it never trains a public model, and you can export or delete it any time.
Is this for dads and partners too?
Yes. Partner accounts are included free on the Family plan, and we screen partners for paternal PPD too (about 1 in 10 dads experience it; it's real and it's under-diagnosed). The partner sees a tailored daily digest with concrete things to do — not just feelings to track.
Can I cancel?
Any time, one tap. PDF export of everything in your account is one more tap. We don't bury cancellation behind a chat widget. If you cancel, your data is yours to keep or delete.
Your next 3am is closer than you think.
Your founding spot is here.
Join the 4,127 expecting + new moms already on the early-access list. Twenty minutes from now, the app is calibrated to your story — and tonight at 3am, you won't be alone with Google.