BNS 300

Apuntes

BNS 300 UNIT 3 BY N.VILANE Changes and adaptation to pregnancy They begin in the first week of pregnancy • Pychological and emotional changes • Develop flactuational temperment • If not ready fro pregnancy • Management-counselling Reproductive system • The uterus-oestrogen stimulate growth and multiplication of myometruim with increased vasculization. • Grown in size in the first 20 weeks the it elongates • Progesterone-relaxes the myometrium inhibiting contractions and explulsion of the fetus before term • Uterine shape-from pear shaped to globular during the first 12 weeks • At 20 weeks it is ovoid till term • Position-in pelvic before pregnancy,at pelvic brim at 12 weeks, at 16 weeks it has grown half way between symphysis pubis and umbilicus, at 24 weeks it is 1 cm above the umbilicus. at 30 weeks midway between umbilicus and xiphi sternum, at 36- 40 weeks at level of xiphi sternum. • At 36-38 weeks in primigravida fetal head may angage into the pelvic cavity leading to lightening. The endometrium • The endometrium is known as the decidua • The corpus luteum produces progesterone and oestrogen • These hormones make the decidua mostly the fundus thicker ,richer and more vascu...