4 month of pregnancy

The fetus during the 13th and 14th week

As regards the 13th and 14th week of pregnancy:

  • The fetus has a Crown-Rump Length (CRL) of about 8 centimeters (3 inches).
  • Her biological sex can sometimes be seen by looking at her external sex organs with an ultrasound.
  • Her hair begins to grow.
  • In biologically male fetuses, the prostate gland begins to develop.
  • In biologically female fetuses, the ovaries move from the abdomen to the pelvic area.
  • The roof of the mouth of the fetus has formed.

The fetus during week 15 and 16

Regarding the 15th and 16th week of pregnancy:

  • The fetus has a cephalo-rachidian length (CRL) of about 12 centimeters (4.5 inches).
  • In the ovaries of biologically female fetuses, hundreds of thousands of eggs are formed.

Symptoms of pregnancy in the 4th month

Some of the first signs and symptoms of pregnancy disappear when you’re 4 months pregnant.

  • Your nausea usually subsides.
  • But some digestive problems, such as heartburn and constipation, can prove annoying.
  • Usually the changes of your breasts continue: growth, pain, darkening of the areola.
  • Shortness of breath or breathing faster is common.
  • Increased blood flow can result in some unpleasant symptoms of pregnancy, such as bleeding gums, nosebleeds, or stuffy nose.
  • You may also feel dizzy or faint due to changes in your blood and blood vessels.

Katherine Johnson, M.D., is a board-certified obstetrician-gynecologist with clinical expertise in general obstetrics and gynecology, family planning, women’s health, and gynecology.

She is affiliated with the Obstetrics and Gynecology division at an undisclosed healthcare institution and the online platform, Maternicity.com.

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