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To wonder if the date of conception determines sex of baby?

(34 Posts)
WildBelle Mon 27-Feb-17 22:06:18

In my limited experience it does but interested in others' experiences.

My understanding is that girl sperm live longer (7 days) and boy sperm swim faster, but die quicker (24 hours). So knowing that with both my kids I conceived on day 11 of my cycle, and didn't ovulate until day 14, they could only be girls (and they did turn out to be girls).

If you know for definite when you conceived/ovulated, does your experience back this theory up, or did you have an exception?

Wishiwasmoiradingle2017 Mon 27-Feb-17 22:08:10

I only dtd on day 23 and had a dd. . This happened twice!

WildBelle Mon 27-Feb-17 22:08:58

Wow day 23! How long were your cycles?

PacificDogwod Mon 27-Feb-17 22:09:07

Yes, that's the theory.
There's no evidence that it works in practice - well, at least in my study of 4 it did not work even once grin

WildBelle Mon 27-Feb-17 22:13:44

Oh grin well the theory is not really holding up so far then.

Permanentlyexhausted Mon 27-Feb-17 22:18:13

My experience seems to back this up (I think).

So I conceived late in my cycle (dtd after ovulation) and had a boy and early in my cycle (dtd before ovulation) and had a girl.

lightgreenglass Mon 27-Feb-17 22:19:23

If this was true then DS2 should have been a girl

DramaAlpaca Mon 27-Feb-17 22:21:13

The theory worked for me - I have three boys and I'm certain all of them were conceived on the day I ovulated, which for me was day 14.

Astoria7974 Mon 27-Feb-17 22:21:33

My cousin was planning girls using this logic and ended up with four boys - all four times she dtd at least 3 days before ovulation. On one occasion it was a week.

DramaAlpaca Mon 27-Feb-17 22:21:58

The theory worked for me - I have three boys and I'm certain all of them were conceived on the day I ovulated, which for me was day 14.

TheOnlyLivingBoyinNewCork Mon 27-Feb-17 22:22:18

It's been thoroughly debunked. (plus its obvious nonsense)

Chocolatebuttons12 Mon 27-Feb-17 22:22:49

DTD day of ovulation - boy

DTD 3 days before - girl

So it is accurate for me.

BillyButtfuck Mon 27-Feb-17 22:23:53

That's the theory, we had sex 4 days before ovulation and have DCDA (two eggs, two sperm) twin boys.

ThornyBird Mon 27-Feb-17 22:24:30

Don't know when dc1-3 were conceived blush but with dc4, I'd been for a smear and was told I was ovulating so dh raced home early (working away) and we dtd. Dc4 is a boy so the theory fits for him.

Catsize Mon 27-Feb-17 22:29:00

I had IUI before ovulation. I had it abroad after a false clear blue smiley face test resulted in me travelling Straightaway, anticipating the treatment. A scan showed I was not ovulating and still had not three days later. I had the treatment anyway on the off chance it would work and was told that if it did, it would be a girl because of the timings. It was a girl!

TheOnlyLivingBoyinNewCork Mon 27-Feb-17 22:33:27

It was one book, based on nothing at all but a theory, that has been repeatedly disproved by actual science.

www.ncbi.nlm.nih.gov/pubmed/7477165

www.ncbi.nlm.nih.gov/pubmed/9647580

I can't believe anyone still buys this crap.

Jojay Mon 27-Feb-17 22:36:38

I've got boy / girl twins. Work that one outgrin

EastMidsMummy Mon 27-Feb-17 22:40:41

Yep, you're right. Conceived on an even number date = girl. Conceived on an odd number date = boy.

sibys1 Mon 27-Feb-17 22:52:50

EastMidsMummy - glad to see we have a scientist in the thread.

MrsFinkelstein Mon 27-Feb-17 23:17:49

I got boy/girl twins, so how does that fit into the theory?

Catsize Tue 28-Feb-17 07:59:55

I am pretty sure nobody is suggesting that boy/girl twins are impossible. The theory proposed is that girls are more likely than boys if you have treatment/intercourse prior to ovulation.

Applebite Tue 28-Feb-17 08:26:59

I can see the theory - see also certain positions for a boy, as it's supposed to shorten the distance for a fast swimming male sperm - but suspect in practice it's still pretty much 50/50!

Snowflakes1122 Tue 28-Feb-17 08:34:21

Theory works for me. 3 girls all dtd before ovulation.
One time we tried for a boy and dtd on ovulation day and he was indeed a boy.
I also definitely ate a more healthy low fat diet with my girls. Probably all coincidence but who knows.

TheOnlyLivingBoyinNewCork Tue 28-Feb-17 09:58:47

Of course its all coincidence.

Peoples fondness for anecdata and illogical beliefs is just bizarre.

winefixeswhine Tue 28-Feb-17 10:03:24

I read the shettles book prior to last baby and swayed for a girl, did three days before ovulation then abstained. We have a girl. Whether it really works is anyone's guess but I'm pleased I gave it a go.

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