According to Shettles, timing sex as close to or even after ovulation is the key to sway for a boy. Shettles explains that couples trying for a boy should avoid sex in the time between your menstrual period and days before ovulation. Instead, you should have sex on the very day of ovulation and up to 2 to 3 days after.
On the other hand, having sex from 2 days before ovulation, through a few days after ovulation, is better for conceiving a boy. Around the 2-day point, 48 hours before ovulation, seems to be the 50/50 mark. (2) The pH of the women's tract is also very important.
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.
The ratio of male to female births, called the sex ratio, is about 105 to 100, according to the World Health Organization (WHO). This means about 51% of deliveries result in a baby boy.
Almost everyone has around a 50% chance of having a boy and a 50% chance of having a girl. What we can say is that dad's sperm determines whether a baby will be born as a boy or a girl. About half of his sperm will make a boy and half a girl. The sex of the baby depends on which sperm gets to the egg first.
Note: The only way to choose your baby's gender, would be to go for in vitro fertilisation (IVF), where the egg is fertilised with the man's sperm in a laboratory. Doctors are able to check the gender of the embryos before re-implanting them in the mother.
The proportion of male babies was significantly higher (65.5 +/- 3.9 per cent, mean +/- S.D.) in the offspring of women who resumed intercourse two days after ovulation. This proportion tended to be lower on or near the day of ovulation than on the previous one or two days.
Best positions: deep penetrative sex is preferable. This helps to deposit the semen and sperm closest to the woman's cervix so they are given the best opportunity to get to the egg in the fallopian tube. Twelve hours before ovulation is thought to maximise the chances of conceiving with a boy.
According to Shettles, timing sex as close to or even after ovulation is the key to sway for a boy. Shettles explains that couples trying for a boy should avoid sex in the time between your menstrual period and days before ovulation. Instead, you should have sex on the very day of ovulation and up to 2 to 3 days after.
There are many ideas about ways to influence baby's sex and how to conceive a boy or a girl, but these are mostly myths or "old wives' tales" that aren't supported by modern science. The only reliable way to choose a baby's sex is by using IVF with genetic testing.
It takes about 24 hours for a sperm cell to fertilize an egg. When the sperm penetrates the egg, the surface of the egg changes so that no other sperm can enter. At the moment of fertilization, the baby's genetic makeup is complete, including whether it's a boy or girl.
In terms of birth weight, summer was the best time to conceive. The team found that mothers who conceived from June through August gained more weight during their pregnancies and gave birth to infants who were, on average, about 8 grams heavier than in other months.
A woman's peak reproductive years are between the late teens and late 20s. By age 30, fertility (the ability to get pregnant) starts to decline. This decline becomes more rapid once you reach your mid-30s. By 45, fertility has declined so much that getting pregnant naturally is unlikely for most women.
Every egg has an X sex chromosome; a sperm can have either an X or a Y sex chromosome. If the sperm that fertilizes an egg has an X chromosome, the baby is female; if it has a Y chromosome, the baby will be a boy.
There are few persons who believe that, the ovary of the right side yields ova which on fertilization develop as males, and the ovary of the left side yields ova which are potentially female but it is not scientifically proven. Development of female or male child depends on chromosome (X or Y) from father's sperm.
Having a baby boy means you have a best friend for life. When he is small, he will be delighted to tell you all the things happening in his life, and when he grows up, he will lend you a shoulder to lean on. As a mother, you will be your baby boy's favorite person in the whole wide world!
The sperm must be able to invade the cervix via the cervical mucus by virtue of their own swimming ability. Nothing about the sexual act will help those sperm get into the cervix. They simply have to swim into the mucus on their own, and this requires a great deal of coordinated, cooperative activity on their part.
In an average 28-day menstrual cycle, ovulation typically occurs about 14 days before the start of the next menstrual period. However, each person's cycle length may be different, and the time between ovulation and the start of the next menstrual period may vary.
4. Lay down and relax for a few minutes after sex. Standing up or going to the bathroom after sex may pull sperm away from their destination. So, lying on your back for 15 minutes or so after sex may help keep sperm moving in the right direction.
Fertility treatment
Some fertility drugs work by stimulating a woman's ovaries, which can sometimes cause them to release more than one egg. If sperm fertilizes both of these eggs, this can result in twins. In vitro fertilization (IVF) can also increase the chance of conceiving twins.
Sexual positions
Deep penetration, for example doggy style, means the male sperm that can swim faster start their race closer to the cervix and are more likely to reach the egg first, resulting in a boy. To try and conceive a girl, Shettles suggested avoiding deep penetration, favouring the missionary position.
However, for a given pregnancy, only the mother's genetics matter. Fraternal twins happen when two eggs are simultaneously fertilized instead of just one. A father's genes can't make a woman release two eggs.
Factors that increase the chance of twins include: consuming high amounts of dairy foods, being over the age of 30, and conceiving while breastfeeding. Many fertility drugs including Clomid, Gonal-F, and Follistim also increase the odds of a twin pregnancy.