Why start the clock on pregnancy before sperm even meets egg and, actually, before your ovary even dropped the fated egg that made your baby? The LMP is simply a more reliable day to date a pregnancy from. What to Expect follows strict reporting guidelines and uses only credible sources, such as peer-reviewed studies, academic research institutions and highly respected health organizations.
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Registry Builder New. Medically Reviewed by James Greenberg, M. Medical Review Policy All What to Expect content that addresses health or safety is medically reviewed by a team of vetted health professionals. You can hardly wait until your due date — but when is it again? Find out exactly how many weeks and months into pregnancy you are. Back to Top. In This Article. Continue Reading Below. More About Pregnancy Trimesters. Your Guide to the First Trimester of Pregnancy.
Your Guide to the Second Trimester of Pregnancy. Your Guide to the Third Trimester of Pregnancy. Melissa shares her story of how her baby caught chickenpox at 5 weeks old.
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The State of Victoria and the Department of Health shall not bear any liability for reliance by any user on the materials contained on this website. Skip to main content. Healthy pregnancy. Home Healthy pregnancy. Baby due date. Actions for this page Listen Print. Summary Read the full fact sheet. On this page.
Length of gestation Determining baby due date Pregnancy ultrasound Premature babies Overdue babies Where to get help Things to remember. Some clues to the length of gestation include: Ultrasound examination especially when performed between six and 12 weeks Size of uterus on vaginal or abdominal examination The time fetal movements are first felt an approximate guide only. The general procedure for a pregnancy ultrasound includes: The woman lies on a table.
The transducer is moved across the abdomen. The sound waves bounce off internal structures including the baby and are transmitted back to the transducer. The sound waves are then translated into a two-dimensional picture on a monitor. Premature babies A baby born prior to week 37 is considered premature. Often there is no known cause for a premature labour; however, some of the maternal risk factors may include: Drinking alcohol or smoking during pregnancy Low body weight prior to pregnancy Inadequate weight gain during pregnancy No prenatal care Emotional stress Placenta problems such as placenta praevia Various diseases such as diabetes and congestive heart failure Infections such as syphilis.
Overdue babies Around five out of every babies will be overdue, or more than 42 weeks gestation. Your e-mail was sent. Save to my dashboard Sign in or Sign up to save this page. Saving Just a moment, please. You've saved this page It's been added to your dashboard. In This Topic. What is a full-term pregnancy? Full term : Your baby is born between 39 weeks, 0 days and 40 weeks, 6 days. Late term : Your baby is born between 41 weeks, 0 days and 41 weeks, 6 days.
Post term : Your baby is born after 42 weeks, 0 days. How was the length of pregnancy defined in the past? Last reviewed: September, See also: Pregnancy week by week feature , 39 weeks infographic , Why at least 39 weeks is best for your baby.
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