What is the average weeks of a pregnancy

Three months pregnant or four? Fortunately, the answers are relatively simple once you know what to count. There are 40 weeks or days in a pregnancy. Your due date is calculated starting from the first day of your last menstrual period even though most pregnancies are not conceived until two weeks later. Keep in mind that only about 30 percent of pregnancies will reach precisely week There are three trimesters in a pregnancy: the first trimester , which lasts from approximately weeks 1 to 13, the second trimester , which lasts from about week 14 to week 27, and the third trimester , which lasts from around week 28 to week 40 and up.

Your 40 weeks of pregnancy are counted as nine months. But wait … there are four weeks in a month, which would make 40 weeks 10 months. Not exactly. Four weeks is 28 days, but months with the exception of February, of course have 30 or 31 days, making each month about 4. If you're carrying a single baby, a full-term pregnancy is between the start of 39 weeks up to the end of 40 weeks.

If you're carrying twins, a full-term pregnancy is considered at least 38 weeks. Which is right? Short answer: both.

Turns out how many weeks into pregnancy you are is a little different than how many weeks pregnant you are. Fifteen full weeks have gone by, but not 16 weeks, so people say that you're both 15 weeks pregnant and in week 16 of pregnancy. To clear things up, think about birthdays. When you turned 1 year old, you had lived through your first year and were starting on your second. In other words, on your first birthday you were in day one of your second year.

You and your baby at 37 weeks pregnant. Your baby at 37 weeks At 37 weeks, your pregnancy is considered full-term. You at 37 weeks When you're around 37 weeks pregnant, if it's your first pregnancy, your baby moves down ready to be born. Things to think about the signs of labour pain relief in labour , including things you can do yourself what happens at the hospital or birth centre and when to contact your antenatal team tips for your birth partner to support you during labour and birth what happens if your baby is breech , when a baby is born bottom first, which is more complicated than a head-first birth a caesarean , when you have surgery to deliver your baby the newborn blood spot heel prick test that will be offered to your baby The Start4Life site has more about you and your baby at 37 weeks pregnant.

Video: What positions are best for giving birth? In this video, a midwife talks through some of the best positions to give birth. Older women were more likely to have longer pregnancies and there was also a link between gestation and a mother's weight when she was born. The researchers also found that length of previous or subsequent pregnancies was related to the length of the one being studied, suggesting a consistency about when women deliver.

But they said it was too early to make any clinical recommendations. Dr Virginia Beckett, spokesperson for the Royal College of Obstetricians and Gynaecologists, said very little was known about the exact mechanisms that determine when labour begins. She added it supports the suggestion that giving someone a "due date" may not be a great idea and can make women feel anxious when they go over. Women warned on iron 'overdose'.

Human Reproduction.