First trimester : week by week


The first trimester starts in the first week of pregnancy and lasts until week 12, in this article, you will discover what happened to you and your baby week by week.

1 – 4 Weeks Pregnant

1 – 4 weeks pregnant: What’s going on with you:

The first week of your last period is the first week of your pregnancy. Conception occurs about two weeks after your menstrual cycle begins. So, your due date is calculated by counting 40 weeks from the start of your last menstrual period. Your hormone levels will fluctuate to create a thick uterus lining in preparation for the baby expected to grow there. There are usually few if any symptoms of pregnancy during the first seven days.

By week 2, if you were lucky, successful fertilization will have occurred when your egg met the sperm. It’s is because ovulation usually occurs between 11 to 14 days after your period. It means that even while you are having your period, your body is getting ready for pregnancy. Your hormone levels will continue to fluctuate creating a thick uterus lining in preparation for the now fertilized egg. You may experience some cramping, nausea, tenderness of breasts or increased vaginal discharge during this time.

By week 3, slight bleeding may occur when your fertilized egg implants itself into the uterine lining. You may also experience a cramp-like pain on one side of your stomach. During fertilization, if two of your eggs are fertilized, you will become pregnant with fraternal twins. If one egg is fertilized and it splits into two, this will result in identical twins.

Week 4 is usually the week that most women find out that they are pregnant because it is during the fourth week when you will discover that you’ve missed your period. You may experience severe cramping, a frequent need to urinate or tenderness and swelling of your breasts. Some women experience the same symptoms of menstruation even without the bleeding. At this stage, most women can successfully prove their condition by using a pregnancy test kit.

1 – 4 weeks pregnant: What’s going on with baby:

1 – 4 weeks pregnant: What’s going on with baby:

During the early weeks of pregnancy, one or more eggs are dropped by the follicles into the Fallopian tubes where they await fertilization by a single or more sperm. The gender of your baby is determined by whether the sperm is carrying a Y chromosome which produces a male, or an X chromosome which produces a female. As the fertilized egg multiplies, it develops into a ball of cells called a blastocyst, and from that ball, a recognizable baby form eventually emerges. At three weeks pregnant, although your baby is overgrowing, he or she is only a cluster of cells that are around the size of the head of a pin. Amniotic fluid accumulates around your tiny baby which will eventually become the amniotic sac, the sac which cushions the baby for the entire 40 weeks.

At 4 weeks pregnant, your baby (now scientifically referred to as an embryo) has grown to about .04 inches. It means that your baby is still tiny and begins to look like a little tadpole. The placenta also begins to develop. The placenta will become your baby’s only source of food, blood, oxygen, vitamins, and minerals. These essential resources will travel from your bloodstream to the placenta via the cord. It is therefore vital that your bloodstream contains the proper balance of nutrients to keep your baby healthy.

Grow a healthy baby

Taking drugs, over the counter medications, drinking alcohol, smoking and even second-hand smoke is harmful to your growing baby. It is critical that you stop these unhealthy habits once you are pregnant. You must also begin taking at least 400 micrograms of folic acid as soon as possible. It will prevent your baby from developing any neural tube defects. From now onwards, it is advisable that you begin eating a healthy balanced diet rich in fruits, nuts and accompanied by lots of clean water.

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