1 Week Pregnant | Pregnancy Week by Week

1 Week Pregnant | Pregnancy Week by Week 1


It is really hard to feel the fetus inside the mother’s body during the first week. The first week is the time when the fetus forms at the most microscopic level. Therefore, at this time the mother does not notice clearly any signs of conception.

How to calculate the gestational age in the first week?

To know the exact gestational age, the doctor will have to deploy a different method in which the gestational age is even greater than the time of ovulation.

It may sound strange, but pregnancy begins right before the time of ovulation and fertilization. The first week of pregnancy begins from the first day of the last menstrual period (even though it is not until 2 following weeks the fetus is born).

Why so? We can’t determine exactly when an egg is fertilized, but the first day of the last menstrual cycle is a fairly accurate starting point. Meanwhile, the accurate calculation of gestational age is important for pregnancy monitoring and care. By this calculation, the pregnancy will be 40 weeks.

Another way to calculate is from the time of conception (the egg encounters sperm). According to this calculation, the gestation period will be 38 weeks. However, as mentioned, this calculation will be difficult and less accurate.

The calculation of gestational age from the first day of the last menstrual period is a standard measurement that helps to determine the time to perform necessary tests, as well as the right time to give birth and other matters related to pregnancy.

In summary, during the first week of pregnancy, the baby is not yet formed but moms need to prepare mentally and physically. 

1 Week Pregnant | Pregnancy Week by Week 2

Changes occurring in the mother’s body during the 1st week of pregnancy

In this week, the amount of estrogen and progesterone in the blood increases, signaling that the lining of the uterus begins to thicken in preparation for implanted fertilized eggs.

In about 1 more week, the next period of ovulation will begin. Prepare good health, listen to every body’s change, avoid stress, or illness, as it can affect mom’s ovulation.

Activities mom should do this week

To increase the probability of pregnancy, intercourse is required between 72 hours before and 24 hours after ovulation, because sperm only lasts no more than 72 hours and eggs live only 24 hours after ovulation.

Before having sex, study ovulation to identify chances, learn about sexual intercourse positions that can help mom conceive faster and reduce unnecessary worries for mom and partner. 

Last but not least, if trying to get pregnant, mom needs to stop drinking alcoholic beverages, not smoking and taking any medicine to prepare the best for pregnancy. If currently taking prescription medication, mom has to consult the doctor for advice. Do not forget to take multivitamins with at least 400mg of folic acid to reduce the risk of birth defects for the baby.

Folic acid is important throughout pregnancy. Natural folic acid is often found in beans, especially peas, dried nuts, and they work to prevent defects from early pregnancy. In addition, mom needs to consume more iron and calcium, which helps create strong bones for both mother and baby. 

Finally, mom should mark the start of the menstrual cycle on the calendar to keep track of baby development.

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