Weather in Sri Lanka in November. The average maximum daytime temperature in Sri Lanka in November is a hot 30Â°C (86Â°F) with high heat & humidity. There are usually 7 hours of bright sunshine each day, which represents 58% of the 12 hours of daylight. The average sea temperature in and around Sri Lanka in November is 28Â°C (82Â°F).
A normal pregnancy lasts for 40 weeks. A perfect normal full term pregnancy is 40 weeks. However, it is normal to go into labor at 37-38 weeks. How Many Weeks Is Pregnancy. A full term pregnancy is 40 weeks, but it is safe to delivery a baby between 38-42 without it having any health issue. 40. 40 weeks from the first day of your last period.  as said by brain child is correct. that is how the due date is calculated.
The only time you might want to be concerned if it is more than a month either way. Full term pregnancy is bettween 37-40 weeks not exactly 40 weeks. If you have a baby at 37 weeks they still consider it full term. You're due date is at 40 weeks and 37 is considered full term. But there is only one month with exactly 4 weeks(most years) so it still is about 9 months.