Week 1 Development

So, your pregnancy is confirmed? Many congratulations! Well, you have a baby on board, now. It is the time when your body undergoes many changes. Do you know- What are the changes that occur during the first week of pregnancy? Knowing them will only make your pregnancy a little more interesting and you will take care of yourself accordingly.

First, let us discuss the changes that occur during development of your baby during the first week of pregnancy.

During the first week of pregnancy, the only thing that happens is egg leaves the ovary and moves to the fallopian tubes. Here it is fertilized by sperm. Now the fertilized egg travels into the uterus through the fallopian tubes. And then implantation occurs.

Here is one more interesting thing. Yes, you are not actually pregnant at this time, because conception itself doesn’t happen until about two weeks after your period ends. Actually, when the egg is fertilized, the cells begin to divide over the next seven to ten days.

Do you know what the baby is called during the first week? It’s a blastocyst.

When the blastocyst breaks down, the external part will become the placenta, and the internal part will be the embryo during the second week of pregnancy. If more than one egg gets released and fertilized, multiple zygotes may form. The zygote contains 46 chromosomes, an equal number from each parent, and the chromosomes have genetic material in them that determines the baby’s sex, hair color, features, skin color, height, and eye color.

Now, what are the changes that occur in your body during this time?
No noticeable physical changes take place during the first week, although many internal changes are happening. Common symptoms may include-

  • Your body is making lots of hormones during this time for the growth of your baby. Yes, these hormones are responsible for making you little moody or cranky.
  • Well, your breast may get bigger and you may get hurt & tingle.
  • You may feel sick to your stomach. Do not worry, this is common and is actually called morning sickness. This can happen at any time of day. Eating crackers & frequent small meals can help.
  • You may feel tired. So, rest as much as you can.
  • There can be a dramatic increase in progesterone levels that will make you happy at some times as well as sad sometimes. So, not to worry.