In your second trimester, you should be gaining the most weight of your entire pregnancy the american pregnancy association says that it is not a cause for alarm if your weight gain isn’t perfectly consistent week to week, but you should contact your doctor immediately if you begin markedly losing weight after your first trimester. Losing weight during pregnancy in second trimester. The second trimester of pregnancy starts at week 13 and lasts until week 28 learn about weight gain, skin changes, and common discomforts.
losing weight during pregnancy in second trimester