MORNING SICKNESS( NAUSEA AND VOMITING OF PREGNANCY) WHAT IS MORNING SICKNESS::: Also called nausea and vomiting of pregnancy is a common condition. It occurs in about 70% of pregnancies and usually starts around 6 weeks of pregnancy and lasts until 14 to 16 weeks of pregnancy. In few women, however morning sickness occurs throughout pregnancy.. Despite its name 'morning' sickness can happen at any time of the day. WHAT CAUSES MORNING SICKNESS? The exact cause is not known. It is mostly thought to occur due to rapid changes in hormone levels. The fluctuations may cause changes in muscle contraction and relaxation patterns of your stomach and intestine, thus leading to nausea and vomiting. The hormones causing the symptons are estrogen, progesterone and human chorionic gonadotropin( hCG) To be continued...... dr nandini shete og/ gyn