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# so how do they figure it out?

i am 9 weeks and I was thinking that I am 3 months, but someone told me that I will not be 3 months until i am 12 weeks. so does anyone know how they figure the months to the weeks or what ever?

Asked by Anonymous at 12:28 PM on Mar. 25, 2009 in Pregnancy

• Well, it's every 4 weeks. So by the time you are in your 4th week, you are at the start of your second month. At 8 weeks you are at the start of your 3rd month. So at 9 weeks you are 2 months and one week.

Answer by Anonymous at 12:30 PM on Mar. 25, 2009

• There are 4.33 weeks in a month, so 13 weeks is 3 months (or a trimester).

Answer by DragonRiderMD at 12:30 PM on Mar. 25, 2009

• The month is 4 full weeks, 28 days instead of 30 or 31 like in a calendar month.

Answer by Crystal1124 at 12:30 PM on Mar. 25, 2009

• I agree with dragonriderMD 13 weeks is one trimester aka 3 months =]

Answer by mommykayti at 1:22 PM on Mar. 25, 2009

• Month1: 1-4weeks, Month2: 5-8weeks, Month 3: 9-12weeks. Month 4 is when it is 5 weeks. Month 4: 13-17weeks, Month 5: 18-22weeks, Month6: 23-27weeks, Month 7: 28-31weeks, Month8: 32-36 weeks, Month 9: 37-40weeks. Some months are 4 or 5 weeks long, it's weird. This list is from the hospital too.

Answer by Anonymous at 1:30 PM on Mar. 25, 2009

• I think what you are confused about is that at nine weeks you are IN your third month, 2months and 1 week. But you won't BE 3 months until 12-13 weeks. (depending on if you are going by months or trimesters)

Answer by susanna71 at 1:45 PM on Mar. 25, 2009

• well im due on august 16 so every 16th is one more month. your pregnant for 9 months witch is 40 weeks so when your 20 weeks your half way through your pregnancy and you'll be 4 1/2 weeks.
when are you due?

Answer by mom_amy at 9:39 PM on Mar. 25, 2009

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