What does the term "quickening" refer to in pregnancy?

The term "quickening" specifically refers to the sensation experienced by a pregnant woman when she first perceives fetal movement. This generally occurs between the 16th and 25th weeks of pregnancy and is an important milestone in prenatal care, as it provides a physical confirmation of the fetus developing inside the uterus. It's a significant moment for many expectant mothers, often enhancing their emotional connection to the fetus.

The other options are related to different aspects of pregnancy and childbirth. The beginning of labor involves various physiological changes that lead to the onset of contractions and cervical changes, which is distinct from the personal experience of fetal movement. The formation of the placenta occurs early in pregnancy and is crucial for sustaining the fetus, but it is not related to the feeling of movement. Lastly, dilation of the cervix is a process that takes place later in pregnancy, specifically in preparation for childbirth, and does not pertain to the mother's perception of fetal activity.