Obstetrics and Gynaecology

1. The characteristics of a gynaecoid pelvis include:
Rounded brim, ischial spine, narrow sciatic notch
Heart-shaped brim, fore-pelvis, divergent side walls
Blunt ischial spine, rounded brim, convergent side walls
Rounded sciatic notch, sub/pubic arch of 90 degrees, straight sidewalls
2. The face presentation:
Sub-occipitobregmatic diameter and bi-parietal diameter present, occipito frontal diameter present, occipito frontal diameter distends vaginal orifice
Mento vertical diameter and bitemporal diameter present, vaginal delivery is not possible
Sub-mentobregmatic diameter and bilateral and bitemporal diameter present, sub-mentovertical diameter distends vaginal orifice
Sub-mentobregmatic and occipito frontal diameter presents suboccipitofrontal diameter distends the vaginal orifice
3. Factors that facilitate lightening to take place include:
Maternal parity and the fetal presentation
Good uterine tone, the formation of the lower uterine segment
Braxton hicks, softening of the pelvis floor tissues
Prostaglandin release, parity of the mother
4. The function of relaxin hormone during preganncy includes:
release ligaments, inhibits the release of follicle-stimulating hormones in abeyance
production of cervical mucus, breast enlargement reduces oxytocin release
relaxes the pelvic girdle, soften the cervix and suppress uterine contraction
reduce the production of oxytocin, soften the cervix, inhibit the production of the leuteinizing hormone

Read more about the hormone relaxin here.

5. Lightening in pregnancy commences at week
36
38
40
42

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