怀孕期间，当体重秤上的数字上升时，焦虑就会悄悄进来。分娩和分娩可能意味着体重会突然急剧下降，而一些体重可能会在分娩后持续数周或数月。准妈妈们可以通过观察她们的平均体重来了解她们在产后几分钟到几个月的时间里能减掉多少磅。
体重增加
女性在怀孕期间增加的多余体重并不都是因为生了孩子。根据美国国家医学图书馆的研究，怀孕前体重正常的女性在怀孕期间可能会增加25到35磅。只有8磅的体重是因为有了孩子。胎盘，额外的乳房组织和羊水约占6到9磅，而你的扩大子宫包在2到5磅之间。维持怀孕所需的额外血液供应也意味着额外的4磅。虽然大部分的体重在你生完孩子后会逐渐减少，但在怀孕期间增加的5到10磅的体脂可能会持续更长时间。
分娩后不久
婴儿中心的文章《产后身体变化》(Body Changes after birth)称，分娩后，母亲可以立即减轻婴儿的体重，以及血液、羊水和胎盘带来的一些体重，这可能会让你减轻约12磅。During your first week, you may also notice that you are sweating and urinating a lot more than usual. By the end of that week, you may find yourself about 5 pounds lighter -- meaning a total loss of 17 pounds since giving birth.
周后出生
好消息是，根据美国国家医学图书馆的文章《怀孕后减肥》，大多数妇女在产后6周就能减掉怀孕期间增加的体重的一半。It may take 6 months after giving birth, or longer, to lose all of the additional weight. Some women may not lose much weight during that time, especially if they did not gain much weight during pregnancy. For these women, weight loss may pick up when a doctor gives them permission to resume exercise routines, usually at the 6-week postpartum checkup.
额外的注意事项
母乳喂养每天可以燃烧高达500卡路里的热量，所以放弃配方奶可能意味着更快的减肥，根据国际母乳喂养联盟的文章，“母乳喂养中的减肥”。Breastfeeding mothers who eat when hungry may lose between 1 and 1 1/2 pounds per month during the first 4 to 6 months after delivery. Eating a varied diet with plenty of fresh fruits, vegetables and grains, as well as getting back into an exercise routine, may also help you get back to your pre-baby weight sooner, according to The Mayo Clinic article, "Weight Loss After Pregnancy: Reclaiming Your Body."