By week

1st week of pregnancy


In obstetrics, there are two “first” weeks of pregnancy. The first obstetric week is counted from the first day of the last menstruation, and the first embryonic week is counted from the moment of fertilization of the egg. Be sure to check with your gynecologist to determine which period is being discussed to avoid any misunderstandings.

Table of Contents

The onset of pregnancy

The ovum, ready for fertilization, comes out of the ovarian follicle into the fallopian tube – there comes the period of ovulation and waiting for fertilization.

It is the changes in the hormonal background that trigger all the processes of change in the female body. Thus, follicle-stimulating hormone (FSH) on the first day of menses activates the development of the follicle in the ovary. The uterus contracts under the influence of prostaglandin, the production of which increases. But the level of estrogens and gestagens at this time is significantly reduced. As a result, with menstrual bleeding comes out the detached layer of endometrium. Nothing unusual woman in this week does not experience, menstrual short-term pain in the lower abdomen, discharge from the vagina for a period of 3 to 7 days. It is worth paying attention to the following facts:

  • For a number of indications after the end of the first week, an ultrasound may be scheduled, where the ultrasound specialist will detect a growing follicle and predict the exact date of ovulation.
  • To learn about the onset of pregnancy will help to measure the basal temperature. During ovulation, the temperature rises by an average of 0.4 degrees. Subsequent measurement during pregnancy will indicate the condition of the fetus.

A healthy regimen for the mom-to-be

The first week from conception is crucial for the development of the future child. Therefore, it is very important to adhere to a healthy lifestyle, to observe the regime of labor and rest. In the future, this will ensure a comfortable pregnancy and proper development of the fetus. It is worth listening to a number of recommendations of obstetricians and gynecologists:

  • Be sure to ask your doctor whether you can plan a pregnancy in the current menstrual cycle. Your partner should also monitor his or her health.
  • It will not be unreasonable to take tests together with the future father of the child, to which you will be referred by your doctor. If you are ill and taking medication, he may be able to find another treatment that is safe for the future child. Also, be sure to tell your
  • doctor about chronic illnesses and other details about your health. All this is crucial for a healthy pregnancy and its further course.
  • During this period, exclude X-ray examinations, which carry a lethal risk for the future child, uncontrolled intake of medications, as well as contact with any chemicals.
  • Protect yourself from negative emotions and heavy physical exertion, spend more time in the fresh air, have a good rest and get enough sleep. Do not lift heavy weights, refuse dangerous and tiring sports. Now more than ever you need peace and good mood.
  • To future baby fully developed, his mother needs to eat properly and include in your diet healthy products – meat and fish, fruits and vegetables, legumes, cereals, dairy products and berries.
  • Completely eliminate alcohol, smoking, food and supplements, high doses of caffeine and fast food. Unfortunately, bad habits can cause disorders of fetal development and the course of pregnancy, up to its termination. Therefore, now is the time to give them up (and not to return in the future, setting a positive example for the growing baby).
  • All vitamins and medicines should be taken as prescribed and under the strict supervision of your doctor.

At the end of the first week, the level of estrogen increases, giving a start to the growth of new endometrium. This means that in about 10 days it will be ready to receive a fetal egg.

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