Counting the weeks, and months

As a follow up to my previous post (regarding the length of a pregnancy in Japan), it has been brought to my attention that the weeks and months are grouped differently too. When someone asked me how far along I was, and I replied `I am in my 5th month`, he gasped and said `But you are too small!`.

Well, that might be because of this...

Here is the grouping of the weeks in a Japanese pregnancy;

Week 0 - end of Week 3 = MONTH 1
Week 4 - end of Week 7 = MONTH 2
Week 8 - end of Week 11 = MONTH 3
Week 12 - end of Week 15 = MONTH 4
Week 16 - end of Week 19 = MONTH 5
Week 20 - end of Week 23 = MONTH 6
Week 24 - end of Week 27 = MONTH 7
Week 28 - end of Week 31 = MONTH 8
Week 32 - end of Week 35 = MONTH 9
Week 36 - end of Week 39 = MONTH 10

And according to my `What to expect when you are expecting` book (from the US);

Week 1 - Week 4 = MONTH 1
Week 5 - Week 8 = MONTH 2
Week 9 - Week 13 = MONTH 3
Week 14 - Week 17 = MONTH 4
Week 18 - Week 22 = MONTH 5
Week 23 - Week 27 = MONTH 6
Week 28 - Week 31 = MONTH 7
Week 32 - Week 35 = MONTH 8
Week 36 - Week 40 = MONTH 9

So according to the Japanese system, I (at 17 weeks, and 2 days) am 2 weeks into my 5th month, but in the American system I am still in the 4th month.

A little confusing!

Comments

  1. i didn't know that the counting system differes!!! btw, i don't even know how to count the month... hope i will learn when needed.

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