Momi guides
Practical, sourced pregnancy guides from the Momi team. Every guide starts with a quick answer, cites ACOG, NHS, CDC, WHO or Mayo Clinic guidance, and shows when it was last updated.
Apps and comparisons
Are Pregnancy Apps Accurate? What They Get Right and Wrong
Are pregnancy apps accurate? The date maths is, if your due date is right. Baby sizes are averages, and symptom advice is only as good as its sources.
Pregnancy week by week
Baby Size by Week: Fruit Comparisons and Real Measurements
Baby size by week from 4 to 40 weeks: fruit comparisons plus length in cm and inches and weight in grams and pounds, and why the numbers jump at 20 weeks.
Contraction timer
Braxton Hicks vs Real Contractions: How to Tell the Difference
Braxton Hicks vs real contractions: compare timing, strength, location and what happens when you rest or drink water, plus when to call your provider.
Due date and week calculator
Can My Due Date Change?
Can my due date change? Usually once, at your dating scan. See ACOG's redating rules, why the 20-week scan rarely moves it, and what a due window means.
Lifestyle
Can You Drink Coffee While Pregnant? The 200 mg Limit Explained
Can you drink coffee while pregnant? Yes, within 200 mg of caffeine a day. See how much is in coffee, tea, cola and chocolate, plus decaf and tips.
Lifestyle
Can You Fly While Pregnant? Airline Week Limits and Tips
Can you fly while pregnant? Usually yes, in an uncomplicated pregnancy. Airline week limits (checked Oct 2026), the 28-week letter, DVT tips and insurance.
Due date
Due Date Calculator From Conception or Ovulation
Due date calculator from conception or ovulation: add 266 days, see worked examples, and learn why providers date pregnancy from your last period.
Kick counter
Do Kick Counts Really Matter? What the Evidence Says
Do kick counts really matter? What the AFFIRM trial and Cochrane found, why NHS and US advice differ, and why acting fast on reduced movements matters.
Trimesters
What Is First Trimester Screening?
First trimester screening pairs a blood test with a nuchal translucency scan at 10 to 14 weeks. What it checks, results, cfDNA, and screening vs diagnosis.
Trimesters
First Trimester Symptoms, Tests and What to Expect
First trimester symptoms explained: nausea, tiredness, sore breasts and more, when they ease, your first tests, tips that help and warning signs.
Due date and week calculator
How Is Due Date Calculated? Naegele's Rule Explained
How is due date calculated? Naegele's rule adds 280 days to your last period. See the formula, worked examples, cycle tweaks and when a scan changes it.
Due date and week calculator
How Many Weeks Pregnant Am I From My Last Period?
How many weeks pregnant am I from my last period? Count from day 1 of your LMP: a step-by-step method, weeks-to-months table and trimester dates.
Kick counter
How to Get Baby to Move for Kick Counts (and When Not To)
How to get baby to move for kick counts: pick their active time, lie on your side and focus. If movements have slowed or changed, don't wait. Call now.
Labor
How to Time Contractions
Learn how to time contractions start to start, what the 5-1-1 rule means and when to head to the hospital or call your midwife.
Kick counter
How to Track Fetal Movement: Methods, Patterns and When to Call
How to track fetal movement: what kicks feel like by week, count-to-10 vs awareness, logging your baby's pattern, and the changes that need a call today.
Pregnancy journal
How to Write a Pregnancy Journal, With Weekly Prompts
How to write a pregnancy journal: what to include, 40+ prompts by trimester, bump photo ideas, and digital vs paper journals, so you keep the memories.
Dating
Is Pregnancy 9 or 10 Months? How 40 Weeks Convert to Months
Is pregnancy 9 or 10 months? 40 weeks is about 9 calendar months and 1 week, or 10 four-week months. See the weeks-to-months chart and trimesters.
Due date and week calculator
Is a Pregnancy Calculator Accurate?
Is a pregnancy calculator accurate? It's a good estimate for regular 28-day cycles. See what it assumes, how irregular cycles skew it and when a scan wins.
Due date
IVF Due Date Calculator: How It Works
IVF due date calculator guide: how due dates are worked out from a 3-day or 5-day embryo transfer, with formulas and worked examples.
Baby movements
When to Start Kick Counts (and What's Normal)
When to start kick counts, how many kicks in 2 hours is normal and when to call your provider, based on ACOG and NHS guidance.
Kick counter
Kick Counts With an Anterior Placenta: What to Expect
Kick counts with an anterior placenta: why kicks feel softer or later, where to feel them, and why you should never assume the placenta is the reason.
Contraction timer
Labor Stages and Contraction Times, Explained
Labor stages and contraction times: how long and how far apart contractions are in early, active and transition labor, pushing and the placenta stage.
Symptoms
Morning Sickness: When It Starts, Peaks and Ends
Morning sickness usually starts before 9 weeks and eases by 14 to 20 weeks. Timing, what helps, safe treatments and signs of hyperemesis gravidarum.
Apps and comparisons
Best Pregnancy App for Dads and Partners
Looking for a pregnancy app for dads? We compare dad-specific apps and partner sharing in Ovia, Flo, Pregnancy+ and Momi, with prices and privacy notes.
Prenatal care
Pregnancy Appointment Schedule
Your pregnancy appointment schedule by trimester: which prenatal visits, scans and tests happen when, plus questions to ask at each one.
Apps and comparisons
Pregnancy Apps That Don't Share Data: How to Check
Looking for pregnancy apps that don't share data? How to read App Store and Google Play privacy labels, what Momi's label says, and tips to limit sharing.
Symptoms
Pregnancy Insomnia: Why It Happens and What Helps
Pregnancy insomnia is common, especially in the first and third trimesters: why it happens, safe sleep positions, what to try and when to get help.
Pregnancy journal
Pregnancy Journal for Mom and Dad: A Diary for Both Parents
A pregnancy journal for mom and dad: why partners should write too, prompts for dads and partners, ways to share entries, and how Momi's two diaries work.
Symptoms
Pregnancy Leg Cramps: Why They Happen and How to Ease Them
Pregnancy leg cramps are common, especially at night in later pregnancy. Why they happen, stretches that help, and when leg pain could be a clot (DVT).
Symptoms and health
Early Pregnancy Symptoms, Week by Week
Early pregnancy symptoms and what comes next: common symptoms by week and trimester, what's normal and when to call your provider.
Pregnancy week by week
Pregnancy Symptoms Week by Week, From Week 4 to 40
Pregnancy symptoms week by week, 4 to 40: what is common each trimester, what usually eases, and which symptoms mean you should call your provider.
Pregnancy week by week
Pregnancy To-Do List Week by Week: Your Trimester Checklist
A pregnancy to-do list week by week: what to book, buy, check and pack in each trimester, from folic acid and your first visit to your hospital bag.
Apps and comparisons
Pregnancy Tracking App for Both Parents: What to Look For
Choosing a pregnancy tracking app for both parents: features to look for, which apps offer partner sharing, how Momi's two diaries work, and privacy tips.
Symptoms
Pregnancy vs Period Symptoms: How to Tell the Difference
Pregnancy vs period symptoms side by side: cramps, sore breasts, spotting, mood and nausea. Why they overlap, spotting vs a period and when to test.
Pregnancy week by week
Pregnancy Week by Week Chart (Weeks 1–40)
Pregnancy week by week chart for weeks 1–40: month, trimester, baby size, key milestones and appointments on one page. Printable, sourced, free.
Pregnancy week by week
Pregnancy Weight Gain Week by Week: What's Typical
Pregnancy weight gain week by week: IOM ranges by BMI in pounds and kg, gain per trimester, where the weight goes and when to talk to your provider.
Trimesters
Third Trimester: Your Weeks 28 to 40 Guide
The third trimester runs from week 28 to birth: your baby's growth, common symptoms, movements, appointments, signs of labor and when to call for help.
Symptoms
When Do Pregnancy Symptoms Start? A Week-by-Week Timeline
When do pregnancy symptoms start? Usually at 4 to 6 weeks, around a missed period. A timeline from conception, implantation, PMS lookalikes, when to test.
Trimesters
When Does the Second Trimester Start? Every Trimester's Dates
When does the second trimester start? Week 14 by ACOG's count, week 13 in NHS guides. See all three trimester week ranges, months and what changes in each.
Contraction timer
When to Go to the Hospital for Contractions
When to go to the hospital for contractions: the 5-1-1 rule, NHS advice, when to go straight in and why first and later labors differ.
Due date and week calculator
Why Does a Pregnancy Calculator Add 2 Weeks?
Why does a pregnancy calculator add 2 weeks? It counts from your last period, not conception. Gestational vs fetal age explained, with a simple table.
Trimesters
Second Trimester Honeymoon Period: Why It's Called That
The second trimester honeymoon period explained: nausea eases, energy returns, your bump shows and first kicks arrive. Plus scans and common niggles.
Due dates and dating
- How is your due date calculated?
- Why pregnancy calculators add 2 weeks
- Due date from conception
- IVF due date
- Can your due date change?
- How many weeks pregnant am I from my last period?
- Are pregnancy calculators accurate?
- Is pregnancy 9 or 10 months?
- Pregnancy week by week chart
- Baby size by week
Symptoms and wellbeing
- Early pregnancy symptoms
- Pregnancy symptoms week by week
- When do pregnancy symptoms start?
- Pregnancy vs period symptoms
- Morning sickness
- Pregnancy leg cramps
- Pregnancy insomnia
- Can you drink coffee while pregnant?
- Can you fly while pregnant?
Trimesters and planning
- First trimester symptoms
- First trimester screening
- When does the second trimester start?
- The second trimester honeymoon period
- Third trimester
- Pregnancy appointment schedule
- Pregnancy to-do list week by week
- Pregnancy weight gain week by week
Baby movements
- When to start kick counts
- How to track fetal movement
- Do kick counts really matter?
- Kick counts with an anterior placenta
- How to get baby to move for kick counts
Labor
- How to time contractions
- Braxton Hicks vs real contractions
- When to go to the hospital for contractions
- Labor stages and contraction times
Journals, partners and apps
- How to write a pregnancy journal
- Pregnancy journal for mom and dad
- Pregnancy app for dads
- Pregnancy tracking app for both parents
- Pregnancy apps that don't share data
- Are pregnancy apps accurate?
- Best pregnancy apps in 2026
Hubs and tools
Pregnancy week by week · Pregnancy trimesters · Due date calculator · Kick counter · Contraction timer
Medical disclaimer: Momi and this website provide general information, not medical advice. Always talk to your doctor or midwife; in an emergency call your local emergency number.
Track this in Momi
Momi is a free pregnancy tracker app for iPhone and Android that follows pregnancy week by week, estimates the due date, and keeps a pregnancy journal, weight log, kick counter and contraction timer in one place.
