working out the length of first trimester?

Question

This may seem a stupid question at first, but I have heard that the trimesters in pregnancy are actually different lengths and not exactly 12 weeks per trimester.
Im trying to work out the date my first trimester will be up. My date of last period was 17th August which would make me just over 5 weeks pregnant. do they work out length of trimester from last period or from conception? All this info is confusing me so Im hoping more experienced ladies out there may help me work out a date when my first trimester is up.

I have had a previous miscarriage so am trying to pinpoint the date when I can breathe a bit easier again.

Please, no stupid answers, only genuine helpful ones please
Thanks

Answer 1

Please, please, please do not get so worried watching the dates. Yes it is very traumatic getting past that "safe" stage, but stress certainly doesn't help.

I had 5 miscarriages before 12 weeks so was chuffed to get to 13 weeks. My waters then broke but the pregnancy continued to 21 weeks. I then went into labour & my son never made it.

My following pregancies went fine up to 20 weeks, then because of my previous loss, my blood pressure shot through the roof and I was hospitalised several times until the children were born (both pregnancies at 20 weeks).

I have 2 healthy children, but we make oursleves ill with worry & that is the worst thing you can do.

Stay positive sweetheart, relax & enjoy your pregnancy.

Good luck :-)

Answer 2

The start of your fourth month ( or end of your third - however you look at it) is the end of the first trimester. Tri means 3............
Go get a book called " what to expect when you are expecting" by Heidi Murkoff. It's the pregnancy bible and will help with all these questions. Your question as well as many others that you would not expect is in there. It's excellent in describing all of these little things that worry moms and help distinguish when something is "normal" or not.
Good Luck!

Answer 3

12 weeks from ur last period is when u are considered out of the danger zone, congratulations and i hope things go great with ur pregnancy, like u i had a miscarriage and the firt trimester was agonising, but i had a healthy pregnancy and another child 2 years later, apparantly first time miscarriages are more common than people think, just be positive and again good luck xxx

Answer 4

The first trimester is a third of your pregnancy so usually about 13.5 weeks pregnant you can feel a little more relaxed. The average pregnancy lasts for 40 weeks. Try not to worry..stress isn't good for pregnant ladies...put your feet up as much as possible.

Good Luck and Congratulations.

Answer 5

I'm pretty sure the beginning of week 14 is the beginning of the 2nd trimester. That woudl be 12 weeks post conception, 14 weeks from the first day of your last period.

Answer 6

From the 9th of november you will be 12 weeks i think you can relax around the 30th when you will be 15 weeks you will be in your 2nd trimester at 15 weeks congratulations and good luck

Answer 7

The first trimester is 12 weeks. It is called the "TURNING". As in turning from an embryo to a feotus. I will most definately know it's happening. people usually feel a bit sicky+****

Answer 8

your first trimester is over at 16 wks that's when you generally stop having the sick ness and start to feel like your blooming, your second trimester ends at 32 wks when the weight of the pregnancy takes over. sometimes it varies with different ladies but that is the general twist of it chick xxx

Answer 9

Your first trimester is over at 12 weeks. Three months after that your second is over.

It really is every three months.