The "O-12 Method" isn't a widely recognized term, but it likely refers to the "Shettles Method" for gender swaying, where couples time intercourse around ovulation (Day 14) to influence baby gender: having sex days before ovulation (O-2, O-3, O-4) for a girl, and on ovulation day (Day 14) for a boy, based on theories about sperm speed, though scientific evidence largely disproves it. Alternatively, it could be a simple 12-hour overnight fast for health, common in intermittent fasting.
It is said that there a certain sex positions that increase your chances of having a boy. Deep penetration is said to be the best because male sperm don't live as long, so depositing them as close to the cervix as possible gives them the best chance to reach the mature egg first.
According to Shettles, to conceive a girl you need to:
Have sex 2.5 – 4 days before you ovulate. Timing sex is the key here, so it would help if you keep an ovulation chart where you can predict what days of your cycle you are likely to ovulate and have lots of sex before you release an egg.
After digging into the history, theories, and science, the takeaway is pretty clear. The Shettles method doesn't have scientific backing, and neither do other natural gender swaying approaches. No matter how carefully you time intercourse or follow charts, your odds of having a baby boy or baby girl remain about 50:50.
It's true that sleeping together during your “fertile window” – the five days before ovulation and the day you ovulate – can increase the chances of getting pregnant. But in general, the dates and times of intercourse have no influence over whether your baby is a boy or girl.
To conceive a boy, couples should have intercourse 4–6 days before ovulation. To conceive a girl, couples should have intercourse closer to ovulation day (2–3 days).
“The theory is that the X chromosome is bigger and heavier than the Y chromosome, so the Y-chromosome sperm swim faster,” explains Twogood. “X-containing sperm are more tenacious, so having intercourse longer before ovulation will more likely result in a female-sex fetus.”
Just remember that there are no guarantees and the odds of conceiving a boy or a girl are almost exactly the same for each and every pregnancy. No matter what claims are made by companies asserting their skills in predicting whether a boy or girl will be conceived, don't be too trusting.
"It's good advice to lay in bed for 10 to 15 minutes after intercourse, but you don't need your feet in the air," Goldfarb says. "Your pelvis does not move when you put your legs in the air." Don't go the bathroom during this time either, he says.
Some studies have found that remaining immobile for any time up to 15 minutes after insemination can have a positive impact on conception, but there is little evidence to suggest that gravity is needed in the process.
People across the 18 mostly middle-income countries surveyed say, on average, that 26.1 is the best age to have a first child. There is a lot of agreement on this timing, and in most countries, average ideal ages fall between 25 and 27.
Whole dairy products are a great way to boost your fertility and help your bone health. If you're trying to get pregnant, drink a glass of milk, eat a bowl of yogurt, and even have cheese in moderation.
Top tips for planning a pregnancy for men
Fruits
The study found that maternal age played a key role in children's sex at birth. Women who began having children over age 28 were slightly more likely to have either all boys or all girls. Chavarro said these differences could be due to biological changes in women as they age.
A study published today in Science Advances suggests that, far from a “coin toss,” some mothers may be biologically biased toward having children of one sex or another, with the effect seemingly increasing with age of first pregnancy and the number of children they have.
The protected sperm with the greatest motility travel through the layers of cervical mucus that guard the entrance to the uterus. During ovulation, this barrier becomes thinner and changes its acidity creating a friendlier environment for the sperm. The cervical mucus acts as a reservoir for extended sperm survival.
Give yourself an extra fertility boost by upping your intake of these foods:
Many infertile couples imagine that this is the cause of their problem. If your husband ejaculates inside you, then you can be sure that no matter how much semen leaks out afterwards, enough sperm will reach the cervical mucus. This leakage of semen ( which is called effluvium seminis) is not a cause of infertility.
For healthy semen samples collected between 5:00am and 7:30am were found to exhibit a statistically higher sperm concentration, total sperm count and a higher percentage of normally shaped sperm, compared to samples produced later in the day. Sperm motility was not influenced by the time of sample production.
Nature is designed to favour the conception of boys from September to November and girls from March to May because of an evolutionary mechanism aimed at keeping the overall sex ratio as near to 50:50 as possible, the scientists said.
Which pregnancy trimester is the most painful? The third trimester is the final stage of pregnancy and can be considered to be the most painful. During this stage, your baby is getting bigger, which puts more stress on your body that causes aches and discomfort.
Having sex before ovulation is important. Knowing when you ovulate and having sex regularly from 3 to 4 days before ovulation until one day after ovulation improves the odds of getting pregnant. Ovulation is the process in which an ovary releases an egg.
Many women become pregnant from having sex just one time without birth control. At least 85% of women, who continue to have sex without birth control, even just once in a while, will be pregnant within one year.