Anonymous wrote:

While I generally agree with this, it misses out on a key aspect here:

- it is only effective if the orgasm comes after male ejaculation has already happened inside, so there is a pool for the cervix to dip down into.

But this specific timing seems not ordinary in TTC, don’t you agree?

Yes, I agree. However, the cervical contractions don't necessarily begin at the same time as orgasm.

If I ejaculate on a normal day (no external factors making me tired, etc.), then I'll normally be back in action within 15 minutes. I may not be able to ejaculate immediately, but that way I can last a lot longer.

I'm 38.

Anonymous wrote:Read "Sperm Wars". It's fascinating. Basically boy sperm swim faster and do not live as long 1-3 days. Girl sperm swim slower and live longer - 4-5 days. So, if you want to increase your chances of a girl...have sex 4 days before you ovulate. I knew my third was a girl because i was charting to get pregnant and bummed that my husband was going out of town on business trip over ovulation. He left 4 days before. As soon as I got pregnant - I knew it was a girl. Worked for my SIL too. Defintely not fool proof but can't tilt the odds.

Also, a slightly higher number of babies conceived via ICSI during IVF are female because again - slower girl sperm are easier to catch


https://www.amazon.com/Sperm-Wars-Infidelity-Conflict-Bedroom/dp/1560258489

This is a good book for learning how to conceive in general. There's also the theory that perceived sperm competition can actually increase your overall sperm count.

It is not absolutely necessary. That's not a true statement. However, it does help in the process. The orgasm triggers the cervix to dip down into the pool of ejaculate and draw it up. From an evolutionary perspective, this is part of sexual selection. Women are more likely to have orgasms with men who they perceive to have superior genotypes, men who are usually not their partners.

My wife is extremely fertile and she's never had any trouble getting pregnant. We did the pull-out method consistently for a whole year. No pregnancy. I made sure not to ejaculate near her vagina. It worked. She didn't get pregnant again until she insisted I cum inside her. Got pregnant on the first round.

Anonymous wrote:

Interesting. Can you cite it?

https://www.researchgate.net/publication/228616100_Sperm_competition_in_humans_Implications_for_male_sexual_psychology_physiology_anatomy_and_behavior

This paragraph in particular:

One possible future direction would be to demonstrate evidence that these sperm competition behaviors in humans serve the thus far theoretical function of increasing the probability of producing offspring. For instance, research has demonstrated evidence of prudent sperm allocation according to risk of sperm competition, where men inseminate more sperm when the risk is higher (Parker, 1982, 1990a, 1990b). It would be interesting to determine whether these behaviors actually translate into increased probability of insemination. Were this supported, these findings would not only add to the support for sperm competition theory in humans, but also could have practical, medical implications for couples with fertility problems. Also, much of the work presented here is correlational in design. It will be important for future research to utilize experimental methods. For example, it has been shown that men at greater risk of sperm competition report their partner to be more attractive, and report that their partner finds them more attractive (Shackelford et al., 2002). It may be useful to manipulate experimentally cues of sperm competition risk such that some men are exposed to cues of sperm competition whereas others are not. Men in the former, experimental condition are predicted to subsequently rate their partner to be more attractive and to report that their partner finds them more attractive, for example.

Anonymous wrote:On the off chance that you are not a troll, unless there is diagnosed MFI, the issue is typically not with the sperm reaching the egg. Something like 75% of eggs are fertilized, but fail to develop enough to implant and develop sufficiently to produce HCG. So more sperm via higher sperm count is not going to make a difference.

I actually read an article which proposed the idea of using cues from the risk of sperm competition as a means of helping with infertility.

Has anyone ever looked into the issue of sperm competition to see if it can be used for couples TTC?

The basic idea is that a man will adjust his sperm count in light of any kind of perceived competition from other men. In other words, he will ejaculate more sperm if he thinks his partner has been unfaithful.