Pregnancy occurs when an egg is fertilized by a sperm, grows inside a woman's uterus (womb), and develops into a baby. In humans, this process takes about 264 days, but the obstetrician will date from the last menstrual period or 280 days (40 weeks).
complete A-Z list of all the pregnancy related information or browse the current list of select resources. Pregnancy & Getting Pregnant Related Resources
Pregnancy Images and Slideshows
'Pregnancy Brain' Is Real?
'Three Parent IVF' Technique Set for Approval
3-Parent In Vitro Fertilization: FAQ
Abortion Rates Fall When Birth Control Is Free
About 20% of White Women Smoke While Pregnant
Acid-Reducing Drugs May Not Be Risky in Pregnancy
Age of First-Time Moms Is Going Up
Air Pollution Linked to Preterm Birth With Asthma
Antidepressant Use in Pregnancy May Affect Baby
Antidepressant Use in Pregnancy: Autism Risk?
Antidepressants During Pregnancy: Safe?
Antipsychotics in Pregnancy Risky for Newborns
Are Common Chemicals Affecting Your Fertility?
Are Repeat C-Sections Safer Than Natural Birth?
As Zika Virus Spreads, Doctors Try to Calm Fears
Asthma Drugs During Pregnancy Linked to Slight Risk of Rare Birth Defects
Babies Listen and Learn While in the Womb
Best and Worst Places to Be a Mom
Birth Rate in 2011 Lowest Ever Reported in U.S.
Births Decline; Economy to Blame?
Blood Thinner Doesn't Prevent Miscarriages: Study
Breastfeeding OK for Moms With Asthma
C-Section Rates Are High and Getting Higher
C-Section Rates Aren't Linked to Healthier Babies
C-Sections Not Always Best for Small Babies
Caffeine Linked to Low-Birth-Weight Babies
Can You Take Antidepressants While Pregnant?
CDC: Many Teen Moms Didn't Think They Could Get Pregnant
Cell Phone Use in Pregnancy: Risks for Child?
Certain Antidepressants May Raise Lung Risk in Newborns
Chemical May Disrupt Kids' Development
Chemo During Pregnancy OK
Chemo May Not Harm Unborn Baby
Children Born to Unmarried Couples on the Rise
Coffee Drinking OK in Pregnancy
Could These Common Pain-Relievers Lower Fertility?
Couples Exposed to Zika Should Wait on Pregnancy
Debate Over Antidepressants in Pregnancy Ongoing
Declines Seen in the Induction of Labor Births
Depressed Dads Affect Their Kids Even Before Born
Diabetes, High BP During Pregnancy Increase Middle-Age Heart Risk
Diet Sodas May Raise Risk of Preterm Delivery
Dietary Supplement May Help Prevent Preeclampsia
Draft Updated Advice for Fish Consumption
Duchess Kate & Prince William Expecting 2nd Baby
Earlier-Term Babies, Slight Learning Delay?
Eating Disorders Affect Fertility, Pregnancy
Eating Rice May Raise Arsenic Levels
Eating, Drinking May Be OK During Labor
Egg Freezing for a Future Pregnancy: What to Know
Emergency Declared Over Birth Defects Tied to Zika
Excess Weight, Diabetes Raise Risk of Big Babies
Exercise During Pregnancy for Smaller Baby
Family Trend? 2 Kids, Different Dads
FDA Approves Diclegis for Morning Sickness
Flu During Pregnancy May Be Linked to Autism Risk
Future Fertility Fix? Egg-Producing Stem Cells Found in Human Ovaries
Gene Mutation May Be Linked to Male Infertility
Gestational Diabetes Needs Treatment
Guidelines for Pregnancy During Zika Outbreak
H1N1 Flu Shot Appears Safe During Pregnancy
Having Small Babies May Raise Heart Risk in Moms
Heart Defects, Mom's Weight May Be Linked
Herpes Drugs May Be Safe in Early Pregnancy
High Cholesterol Levels Linked to Infertility
High Plastic Levels in Males Delays Pregnancy
Home Births in the U.S. on the Rise
Home Births Linked to Higher Newborn Death Rate
Hormone Treatment May Drastically Reduce Preterm Births
How Fast Is Your Biological Clock Ticking?
Incontinence After Childbirth May Last Years
Increase in Birth Defects of Abdominal Wall
Infertility Treatment May Raise Birth Defect Risk
Infertility Treatments May Raise Birth Defect Risk
Is High Blood Pressure Linked to Birth Defects?
IVF: Are 3 Embryos Too Many to Transfer?
Kate and William Expecting First Baby
Kids' Behavior Not Linked to Obese Moms-to-Be
Light Drinking During Pregnancy: No Harm to Baby?
Limit Fish While Pregnant? Study Questions Advice
Low Birth Defect Risk From Newer Epilepsy Drugs
Low Vitamin D in Pregnancy Linked to Language Problems in Children
Lupus, Rheumatoid Arthritis Affect Birth Rates
Many Pregnant Women Fear Exercising
Medications and Pregnancy: At Last, a Study
Milk for Mom May Lower Baby's MS Risk
Molecular Explanation for Age-Related Fertility
Mom's Blood Sample Yields Unborn Baby's Genetics
Moms of Preemies Face Health Problems, Too
More Moms Breastfeeding
More Than a Third of Babies Unintended
Morning Sickness Has No Treatments: Study
New Earlier, Noninvasive Paternity Test Developed
New Guidelines for Women With Prior Cesareans
Nicotine Patches Fail Most Pregnant Smokers
Obese Women Retain More Pregnancy Weight
Obesity May Increase Risk of Preterm Birth
Odds of a Healthy Baby Increase With Single Embryo Transfer
One in 10 Pregnant Women Drinks Alcohol
Ovarian Cell Mystery: Reproductive Disorders
Overtime Work in Pregnancy May Affect Baby's Size
Past Pregnancies May Protect Against MS
Preemies Raise U.S. Infant Mortality Rate
Pregnancy After 40: Healthy Weight Improves Risk
Pregnancy Complication Linked to Autism
Pregnancy Extra Weight Gain Ups Kid's Obesity Risk
Pregnancy Treatment for Women With Infertility
Pregnancy Weight Gain Can Hurt Child's Heart
Pregnancy Weight Gain Ups Diabetes Risk
Pregnancy Weight Gain: New Guidelines
Pregnancy: No Weight Gain for Obese Women?
Pregnant Puerto Ricans Fearful of Zika
Pregnant Travelers, Tough Choices on Zika Testing
Pregnant Woman Pregnant Again? Maybe Not
Pregnant Women Affected by Zika Virus
Pregnant Women Don't Get Enough Exercise
Pregnant Women Don't Need Vitamin D Screening
Pregnant Women Getting Flu Shots
Pregnant Women Put Fashion Before Foot Health
Pregnant Women to Get Pertussis Vaccine
Pregnant Women: Get a Whooping Cough Vaccine
Premature Birth Rate Is Dropping
Prescription Meds: Too Common in Pregnancy?
Preterm Birth Rates
Preterm Birth Rates and Infant Death Rates Drop
Preterm Birth Rates Heading in Right Direction, Barely
Preterm-Birth Drug Makena OK as a Generic
Probiotics Cut Belly Fat After Pregnancy
Relationship Troubles Add to 'Pre-Baby' Blues
Routine Ultrasounds May Detect Autism in Utero
Season of Birth May Affect Kids' Allergies
Secondhand Smoke Raises Stillbirth Risk
Sex During Pregnancy: Women Tell All
Sex Not on Most New Moms' Minds
Snuff Use During Pregnancy Is Harmful to Newborns
Strokes During Pregnancy, Childbirth on the Rise
Studies Identify Stillbirth Risk Factors, Causes
Teen Birth Rate Hits Historic Low
Teen Birth Rate Is at Record Low
Teen Births at Record Low, C-Sections at Record High
Teen Births Rise for Second Year
Trendy Baby Names Tend to Fade Fast
Trying to Get Pregnant? Moderate Exercise May Help
U.K. Approves '3-Parent Babies'
U.K. Moves Closer to 3-Parent Babies
U.S. Officials: Zika Focus Is on Pregnant Women
U.S. Ranks 131st in Preterm Births
Uterus Transplant Recipient: Operation ‘A Gift'
Vitamin C No Help for Preeclampsia
Vitamin D in Pregnancy May Be Key for Baby's Brain
Vitamin D Levels at Birth May Predict Obesity Risk
Vitamin D May Cut Pregnancy Risks
Vitamins May Lower Risk of Birth Complication
WHO: Pregnant Women Shouldn't Travel to Zika Areas
William and Kate Welcome Their Royal Baby
Women Have Longer Labors Now
Younger Teens Still Account for 1 in 4 Teen Births Pregnancy A-Z List: Complete Listing of Getting and Being Pregnant Related Information