Pregnancy Week 3

2 min read


Congratulations on fertilization 🙂 At this point you are definitely and positively pregnant but you may not even know as it is way too soon to tell…

Week 3 of pregnancy is in fact the first week of fetus development (although the baby is not called a ‘fetus’ until the 9th week of the pregnancy).

At the beginning of the 3rd week, conception or fertilization has just taken place. Which means the strongest of sperm has traveled through the vagina, through the cervix, through the uterus and into the fallopian tube where it has penetrated the ovum that has been recently released by an ovary. Well, either that, or maybe the sperm has been in the fallopian tube from past 5-6 days, waiting for the ovum to be released!

After fertilization the ovum is called a Zygote.  A zygote has got all the genetic material that will be needed to constitute the baby’s genetic make up (46 chromosomes, 23 from mom and 23 from dad. This set also includes sex determining X And Y chromosomes, means your baby’s sex is determined right at the time of the conception!)

The zygote starts dividing fast while making it’s way through the fallopian tube. In next 72-96 hours, the zygote goes through continuous cell division to form a mass of some hundred cells, called a “Blastocyst”.

Your Baby

is that of a size of the tip of a pin!

Your Belly

Probably looks the same as it did the last week (You’re not gonna show this early!).

Your Symptoms

Bleeding: It’s possible in case the blasocyst has reached the uterus and is trying to bury/ attach itself to the uteral wall. The implantation is known to cause light bleeding. This blood spotting will look different than a period as the blood will be free from clots and will be light pink or brown in color. Bleeding can last 1-2 days. Many women mistake this for an early period. That being said, many women do not experience implantation bleeding. If experience heavy blood flo, wait no more and go visit your doctor.

Cramps: Many women experience light-moderate cramping

Bloating: Some women tend to feel bloated.

Nausea: Nausea in early pregnancy is caused by hCG. hCG, a hormone secreted by placenta. Placenta is developed only after implantation. Which means nausea or morning sickness is a symptom that occurs only after implantation. So in case you are feeling queasy, congratulations! Your growing teeny tiny baby has successfully attached itself to what is going to be it’s home for next 9 months. That’s right, your womb 🙂

Home Pregnancy Test

It might be too early to take one! Home pregnancy tests detect amount of hCG in the urine, and in 3rd week of pregnancy, you might not have enough hCG in your system (unless you are carrying multiples.. you know, more babies, more placentas, means more hCG!)


You may continue with your exercise routine, but if you are into strenuous workout and/or have a history of miscarriage; it is best to consult with your gynecologist/obstetrician first.


Continue with a wholesome, healthy diet that includes all food groups. Also continue taking your prenatal vitamins (including 400mcg of folic acid).

Suggested Read,

What to expect when you are expecting.


Present content is not a medical advise nor should it be substituted for one. Please consult a certified medical professional for medical consultation.

Leave a Reply

Your email address will not be published. Required fields are marked *