CAJ | 학술논문

Objective The effectiveness and acceptability of Billings Ovulation Method (BOM)during breast feeding were studied. At the same time, the monitoring indexes of fertil-ity return vere studied.Methods It was a clinical comparative study of BOM and IUD containing copper(200 mm2). The annual rate of pregnancy, discontinuation rate and continuation ratein the two groups was determined. The serum prolactin and estradiol in 90 breast feed-ing mothers and urine estrogen and pregnanediol in different feeding mothers weremeasured.Results There were 219 subjects in the BOM group and 200 in the IUD group. Thepregnancy rate in this two groups was 1. 43% and 1. 54% respectively. The rates ofdiscontinuation and continuation in the IUD group were8. 87% and 91.35% as well asin the BOM group were 8. 53% and 90. 17% respectively. Neither result was statisti-cally significant (P＞ 0. 05). The experimtal research showed that menses return waswell estimated by 0. 35 ratio of serum prolactin vs. estrodiol. Sensitivity and specifici-ty was 94. 61% and 84. 61% respectively. It also indicated that (1) the levels of urinehormone were closely related to the patterns of cervical mucus and (2) the incidence ofovulating before the second return of menses in partially breast feeding mothers wasmuch lower than that of bottle-feeding mothers (47.05% vs. 94. 20% ).Conclusion BOM is a simple, reliable and well accepted contraceptive method of dur-ing breastfeeding. If it can be combined with the measurement of serum prolactin/estradiol, the date of menses return will be determined more easily. Encouragingmothers to breast-feed will be beneficial to the health of both babies and mothers anddelay the fertility return of mothers.