Evidence-based · Peer-reviewed obstetric research

Labor & Birth Articles

Clinical guides on labor timing, delivery probability, and birth preparation, written for expecting parents and birth professionals.

Filter:labor-signs due-dates preparation complications

When Does Labor Actually Start? Signs, Stages, and Timing

Labor starts when uterine contractions become regular and cause cervical change. Here's how to tell the difference between false alarms and the real thing.

April 5, 2026Read article

All Articles

due-dates7m

How Accurate Is Your Due Date? What Research Shows

Only 4-5% of babies arrive on their due date. Here's what the research says about how accurate EDD calculations really are, and what that means for you.

Apr 5, 2026Read

due-dates7m

First Baby vs Second Baby: How Labor Timing Differs

Second labors average 3 days earlier and hours shorter than first. Here's what the data shows about how labor timing and duration differ between first and subsequent births.

Apr 5, 2026Read

due-dates8m

Going Past Your Due Date: 40, 41, and 42 Weeks

About 50% of first-time mothers deliver after their due date. Here's what "overdue" actually means clinically, what monitoring involves, and when induction is recommended.

Apr 5, 2026Read

labor-signs8m

7 Signs Labor Is Coming in the Next 48 Hours

Bloody show, regular contractions, water breaking, and 4 other signs that labor may start within 48 hours, plus the 5-1-1 rule for when to go to the hospital.

Apr 5, 2026Read

due-dates7m

What Affects When You Go Into Labor? 6 Key Factors Explained

Parity, cervical length, BMI, maternal age, fetal sex, and stress all influence labor timing. Here's what the research actually says about each.

Apr 5, 2026Read

preparation6m

Induced vs Spontaneous Labor: Timing and Risks

ACOG recommends offering induction at 39-41 weeks. Here's how induction works, what the ARRIVE trial found, and how induced labor differs from spontaneous.

Apr 5, 2026Read

due-dates6m

Labor Probability by Week: When Babies Actually Arrive

Week 39 is the single busiest delivery week, but 26% of first-time mothers are still pregnant at 40+0. Here's the actual data table, and what it means.

Apr 5, 2026Read

labor-signs7m

Cervical Dilation and Labor Progress: A Plain-Language Guide

Dilation from 0 to 6 cm can take days. From 6 to 10 cm typically takes 1-3 hours in active labor. Here's what each number actually means.

Apr 5, 2026Read

preparation7m

Third Trimester Prep: What to Do in the Final 4 Weeks

Weeks 36-40 each have specific tasks: GBS testing, car seat installation, hospital bag, birth plan. Here's the week-by-week checklist with specifics.

Apr 5, 2026Read

labor-signs8m

Braxton Hicks vs Real Contractions: The Difference

Braxton Hicks stop when you move, hydrate, or rest. Real labor contractions keep coming and get closer together. Here is how to test the difference at home.

Apr 19, 2026Read

labor-signs8m

How to Time Contractions Correctly

Time from the start of one contraction to the start of the next, not the gap between them. Here is the correct method, the 5-1-1 rule, and the mistakes that mislead.

May 3, 2026Read

labor-signs9m

Water Breaking: What Happens and When to Call

Only a minority of labors begin with the water breaking. Here is how to tell amniotic fluid from urine, which colors are emergencies, and why the clock starts at rupture.

May 17, 2026Read

labor-signs8m

The Three Stages of Labor: A Complete Walkthrough

First, second, and third stage, plus the recovery hour often called the fourth. What happens in each, and how long each typically lasts.

May 31, 2026Read

due-dates7m

Gestational Age vs Fetal Age: How Weeks Are Counted

Pregnancy weeks count from your last period, not conception, so you are "2 weeks pregnant" before conception happens. Here is how the system works.

Jun 7, 2026Read

due-dates8m

Early Term, Full Term, Late Term, Post Term: What Each Means

In 2013, ACOG and SMFM split the old 37-to-42-week "term" window into four labeled categories. Here is what each one means and why the change was made.

Jun 21, 2026Read

complications8m

Preterm Labor: Warning Signs and Risk Factors

Preterm labor means regular contractions and cervical change before 37 weeks. Here are the warning signs, the real risk factors, and why to call right away.

Jun 28, 2026Read

complications8m

VBAC: How Labor Timing Works After a Previous Cesarean

Most people with one prior low-transverse cesarean are candidates for a trial of labor. Here is how success odds, timing, and the 39 to 41 week window work.

Jul 5, 2026Read

complications7m

Twin Pregnancy: Why Multiples Arrive Earlier

Twins average around 35 to 36 weeks, and chorionicity drives monitoring intensity and recommended delivery timing. Here is why multiples arrive early.

Jul 12, 2026Read

complications9m

Group B Strep: What the Test Means for Your Labor

A positive GBS swab is common, not an infection, and not your fault. It changes one thing: you get IV antibiotics during labor, ideally a few hours before delivery.

Jul 19, 2026Read

complications8m

Cervical Length: What the Measurement Predicts

Cervical length is one of the genuinely predictive measurements in obstetrics. A short cervix shifts the probability of preterm birth. It does not decide the outcome.

Jul 26, 2026Read

preparation9m

Hospital Bag Checklist: What to Pack and What to Skip

Most hospital bag lists are twice as long as they need to be. Here is what to pack in three bags, what the hospital already supplies, and what people wish they had brought.

Aug 2, 2026Read

preparation9m

The Bishop Score: How Providers Predict Induction Success

Five cervical findings, scored and added up. The Bishop score is the number behind "your cervix isn't favorable yet" and it shapes how an induction is likely to go.

Aug 9, 2026Read

preparation9m

Natural Ways to Induce Labor: What the Evidence Shows

An honest review of nipple stimulation, sex, dates, raspberry leaf tea, castor oil, pineapple and more, and how strong the research behind each one actually is.

Aug 15, 2026Read

preparation9m

Membrane Sweeping: How It Works and Whether It Helps

What a membrane sweep actually does, what it feels like, when it is offered, what the research says about avoiding formal induction, and when to call after one.

Aug 16, 2026Read