Which cervical changes are observed during pregnancy? 1. The cervical tip becomes soft. 2. The fragility of cervical tissues decreases. 3. The volume of cervical muscles increases. 4. The external cervical os appears as a jagged slit. 5. The elasticity of cervical collagen-rich connective tissue increases.

During pregnancy, several changes occur in the cervical region to prepare the body for childbirth. Here are the correct observations concerning cervical changes during pregnancy:

1. The cervical tip becomes soft - This is true. The tip of the cervix, also known as the cervical os, often becomes soft, a condition referred to as "Goodell's sign." This softening usually happens around the fourth or fifth week of pregnancy.

2. The fragility of cervical tissues decreases - This is false. In fact, the fragility of cervical tissues increases during pregnancy. This is mainly because of increased blood flow and hormonal changes, which can lead to a greater likelihood of bleeding upon contact, known as "Friability."

3. The volume of cervical muscles increases - This is not typically how the cervix is described during pregnancy. The cervix does not have muscles in the conventional sense—it is primarily made up of connective tissue. It does not undergo hypertrophy or increase in muscle volume as would skeletal muscle.

4. The external cervical os appears as a jagged slit - This statement is more likely to be true for women who have previously given birth. The external cervical os of nulliparous women (women who have never given birth) often appears as a small, circular opening, while in multiparous women (women who have given birth before), it may appear as a slit with irregular, jagged edges.

5. The elasticity of cervical collagen-rich connective tissue increases - This is true. Throughout pregnancy, the cervix undergoes a process called "ripening" which is the softening, thinning, and increasing elasticity of the cervical tissue. This is due to changes in the collagen content and organization, which allows the cervix to stretch and dilate during childbirth.