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The study aims to evaluate the efficacy of a family-based dietary monitoring during pregnancy on gestational weight gain in pregnant women. The study will be conducted as a randomized controlled trial, women will be randomly allocated into two groups: a group receiving family-based dietary monitoring, and a control group receiving individual dietary monitoring per standard recommendation.

Very few data has been published on the epidemiology of hypoparathyroidism worldwide. None exists specifically in France. Hypoparathyroidism could led to complications: e.g. symptomatic hypocalcemia, calcifications (brain, eye and other soft tissues), nephrolithiasis/nephrocalcinosis, renal insufficiency. Here,the investigators plan to collect data about both epidemiology, medication and complication of hypoparathyroidism in France.