Pregnancy Month 1: Week 1 – Week 7

Congratulations – you’re pregnant. Find out what to expect in the very early days.

Pregnancy month 1: week 1 – week 7
Although we think of pregnancy as lasting for 9 months, it’s actually 40 weeks. Your due date is calculated from the first day of your last period, so your pregnancy is counted as beginning before you’re actually pregnant!
Pregnancy is divided into 3 trimesters, and each trimester is about 3 months long.

To learn in more detail about the trimesters of pregnancy try our article: Changes During Trimester 1.

 

What’s happening to your body?
The start of pregnancy is conception. About 14 days after your period starts, you ovulate and the egg travels down the fallopian tube.
If the egg is fertilized, the cells that form when egg and sperm meet immediately begin to multiply rapidly. In the following weeks the embryo will develop at an astonishing rate.
But although there’s a lot going on in the very early days, your body won’t look any different on the outside – at first. As the first month progresses, you may put on a little bit of weight, or lose a little if you’ve been sick.
You can do a pregnancy test around the time your period is due.

 

What’s happening to your baby?
In what’s counted as the fourth week of pregnancy, the fertilised egg implants into the lining of your uterus (womb).
The placenta, which will carry nutrients to your baby, and the amniotic sac, which helps to protect your baby are forming. So are the embryo’s eyes and face, although it doesn’t look much like a baby yet.

In weeks 5 to 7 an amazing amount happens. The umbilical cord, which connects the baby to your blood supply, forms. Also developing are your baby’s:

  • circulatory system
  • heart
  • spinal cord
  • internal organs
  • brain

Little limb buds will start to grow, and the embryo has fingers and toes although it’s still tiny – only about half an inch long.

 

How will you feel?
While a lot of this is going on, you may not even know you’re pregnant. The first sign is likely to be when you miss your period. You may also start feeling a bit sick – this can start at around week 6 – and your breasts may feel sore.

 

See what’s going to happen in month 2 of your pregnancy.

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