Shaaban M M, Salem H T, Abdullah K A
Contraception. 1985 Dec;32(6):623-35. doi: 10.1016/s0010-7824(85)80006-8.
This study was undertaken to investigate the effect of use of levonorgestrel contraceptive implants, NORPLANT, by breastfeeding mothers on lactational performance and infant growth. NORPLANT implants were inserted between days 30 and 42 postpartum in 50 lactating women. Two control groups of breastfeeding mothers, 50 each, were studied in parallel: the first used an intrauterine device (Cu T380-Ag) and the second used either barrier or no contraception. There was no difference in lactational performance among the three groups. The increments in infant weight and height in the three groups were within the normal range for Egyptian infants. However, the rates of weight and height gain in the early postpartum months were slightly, but significantly, lower in the NORPLANT group than in the two control groups. However, by the sixth postpartum month, there were no significant group differences in these growth parameters. The possible confusing effect of supplementary feeding is discussed.
本研究旨在调查哺乳期母亲使用左炔诺孕酮避孕植入剂（诺普兰）对泌乳情况和婴儿生长的影响。在50名哺乳期妇女产后30至42天之间植入诺普兰植入剂。同时平行研究了两组各50名哺乳期母亲作为对照组：第一组使用宫内节育器（铜T380-Ag），第二组使用屏障避孕法或不采取避孕措施。三组之间的泌乳情况没有差异。三组婴儿体重和身高的增长均在埃及婴儿的正常范围内。然而，产后早期几个月，诺普兰组婴儿体重和身高的增长速度略低于但显著低于两个对照组。不过，到产后第六个月，这些生长参数在各组之间没有显著差异。文中讨论了补充喂养可能产生的混淆作用。
