QS Study

The uterus is a secondary sex organ. It is an organ of the female reproductive system. Secondary sex organs are components of the reproductive tract that mature during puberty under the influence of sex hormones produced from primary sex organs.

The exact anatomical location of the uterus varies with the degree of distension of the bladder. The uterus lies in angulated position with the vagina, with itself.

The positions of the uterus are

(i) Anteversion – Rotated forward, towards the anterior surface of the body.

The long axis of the uterus forms an angle of about 90° with the long axis of the vagina. This forward bending of the uterus is called anteversion.

(ii) Anteflexion – Flexed, towards the anterior surface of the body.

The uterus is also slightly bent forward on itself. The angle is about 120° and the bending is known as anteflexion.

Fig: Normal Position of the Uterus

The uterus is a movable organ. It undergoes a lot of wear and tear. So, its position is maintained by a number of factors which are as follows:

(A) Primary supports –

(a) Uterine axis,

(b) Muscular or active:

  1. Pelvic diaphragm.
  2. Urogenital diaphragm.
  3. Perinea’ body.

(c) Fibromuscular or mechanical:

  1. Uterosacral ligament.
  2. Pubocervical ligament.
  3. Transverse cervical ligament.
  4. Round ligament of the uterus.

(B) Secondary supports –

  1. Broad ligament of the uterus.
  2. The uterovesical fold of peritoneum.
  3. The rectovaginal fold of peritoneum.