Of the weight loss surgeries currently available, gastric sleeve, or sleeve gastrectomy, is a safe choice with less side effects than other types that transitions well into later surgeries if need be. But how does this popular procedure work? Gastric Sleeve Basics. A sleeve gastrectomy is performed laparoscopically using a small incision.
How to Calculate Gestational Age. 1  Find the date of the first day of your last menstrual period on a calendar. 2  Count the number of full weeks that have passed from the date in Step #1 to today's date. For example, if your last menstrual period started on July 1st and today's date is August 1st, the gestational age is 4 weeks.
How does the pregnancy due date calculator work? Your due date is determined by a simple calculation â Add 280 days (40 weeks) to the first day of your last menstrual period (assuming a 28-day cycle). Note that your menstrual period and ovulation are counted as the first two weeks of pregnancy. If you deliver on your due date, your baby is actually only 38 weeks old, not 40. Need to know : On average only 5% of births take place exactly on the estimated due date.