Lmp and Due date don't match!

[Skylar010203]

So I did a due date calculator thing because I was bored. I am lost it says my first trimester begin on June 22 but I didn't have sex until June 29th and July 6th and my doctor told me my due date was the same as what the calculator gave me which was March 29th. I don't understand how my first trimester could of begin on the 22 if I didnt have sex until the days I listed. Sorry first time pregnancy 18 years old lol. Some one help explain? By the way my last period was June 8th but my doctor is going off something else I think. My doctor said March 29th is my due date.

THIS IS WHAT I ENTERED IN THE CALCULATOR:
Your due date is March 29, 2014.

Your baby was conceived around July 06, 2013.

Your first trimester begins June 22, 2013.
Your second trimester begins September 15, 2013.
Your third trimester begins December 29, 2013.


i also have shorter cycles 24 or 25 days long. If I enter my period date in the calculator is says march 15th but says im like 15 weeks or something

and when i enter march 29th it which is what my doctor told me i am 13 weeks and on august 11th i found out i was 7 weeks and 1 day. at the hospital.

[Skylar010203]

so confusing lol but thank you guys

[Skylar010203]

oh alright, i just didnt know if i conceived in june or july lol im guessing july

[XxKitaraxX]

Also you can't go by your lmp that's just to estimate you have to go by when you conceived and no one knows exactly when they conceived sperm can live a few days inside you and fetal aging can be slower or quicker from person to person like my baby had measurements at 14 weeks some were 14 like femur, humerus, but body and head measurements were 15+ weeks so is really nothing to worry about

[Skylar010203]

i wrote july 6th i had sex on july 5th and june 29th im just curious (:

[Skylar010203]

oh (: so i did conceive on july 6th or something like that?

[pandadew32]

We pretty much go by the gestational age for the whole pregnancy.

[pandadew32]

Your baby could have been only 5 Weeks for the fetal age, but we do go by gestational age for the due date.

[Skylar010203]

im still confused im sorry. so when i was 7 weeks on aug 11th they told me that was the gestational age so what does that mean?

[pandadew32]

Well your baby can show after 8 Weeks. Which is why your first appointment seems a month or so, so far away from when you found out. There's a few books you can read to help you understand what  stages in your pregnancy you are.going through. A great book to read is what you're expecting when you're expecting. This will help one understand, and also is a great way to spend some time since there is around 40 plus Weeks of a ride till baby shows.

[pandadew32]

There is a gestational age N then there is a fetal age. The gestational is where your baby is still an egg waiting to implant. The fetal age is how old the baby might just be, which could be more accurate from an ultra sound but the baby wont show until about ten Weeks. Doctors always go by your last menstrual period, this is just an estimate since there Is not a way to tell exactly when your baby implanted and started developing. This is also why people could have their babies two Weeks early,or two Weeks late. The fetal age starts about two Weeks after the gestational age. Gestational age starts from your last known period.