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Second trimester weight gain. Morning sickness usually fades between weeks 12 and 16 of pregnancy — just as your baby starts to grow in earnest. During the second trimester, your pregnancy weight gain should ideally increase so that you add a total of about 12 to 14 pounds. Third trimester weight gain
This chart does not include weight gain suggestions for women pregnant with more than one fetus. See page 4 of the following reference for guidance on weight gain for women with multiple fetuses: IOM (Institute of Medicine) and NRC (National Research Council). 2009.
Pregnancy weight gain by week. Your week-by-week pregnancy weight gain will vary depending on your metabolism, activity level and genetics. However, ACOG recommends the following weight gain per week for trimesters two and three: Pre-pregnancy BMI is less than 18.5: 1 (1 to 1.3) pounds per week
Pregnancy weight gain might be quite confusing — let's check how much weight you should gain throughout all 3 trimesters of gestation!
When you start your second trimester, you should start to see an average weight gain of 0.5 pounds to 1 pound per week, depending on your pre-pregnancy BMI. Doctors recommend you maintain this slow and steady gain through the end of your third trimester, ending at your ideal weight.
The “right” amount of weight to gain during pregnancy is a balance, based on avoiding the risks associated with too little and too much weight gain. There is no “one-size-fits-all” recommendation.
Understanding your weight gain is the first step towards a healthy pregnancy. As well as our information sheet we have a number of graphs for you to download so that you can plot your weight during your pregnancy. Weight gain during pregnancy (English) PDF (1 MB) Weight gain worksheet: BMI less than 18 (English) PDF (707 KB)
