The uterus does not get smaller in early pregnancy, on the contrary, the uterus will gradually increase in size along with the progress of pregnancy.
The uterus plays an important role in nurturing the embryo and the fetus during pregnancy. Under the influence of estrogen in early pregnancy, the muscle cells increase in size, and there is also a small increase in the number of muscle cells and connective tissue hyperplasia, so the uterus will increase in size.
The uterus is slightly spherical and asymmetrical in early pregnancy, and the wall of the uterus at the site of the fertilized ovum will protrude significantly. As the pregnancy progresses and the fetus, placenta and amniotic fluid form and develop, the uterus will continue to enlarge and soften.
A series of changes in the uterus in early pregnancy are to adapt to the growth and development of the fetus as well as to prepare for labor and delivery, which are all normal pregnancy changes.