Developed by Elizabeth Whelan, this method revolves around the times when a woman's body is more favorable to either the X-sperm or the Y-sperm based on her menstrual cycle. For a girl, a couple should have sex two or three days before ovulation or on the day of ovulation to increase their odds of having a girl.
Sperm with X chromosomes (girl sperm) are more likely to fertilize an egg at this point in the cycle. So when you have sex closer to ovulation or on ovulation day, girl sperm has a greater chance of survival. According to Whelan, the success rate of having a girl with this method is 57 percent.
The Whelan Method
So if they're hoping for a boy, the theory says, couples can try to have sex four to six days before ovulation. And to conceive a girl, they can hit the sheets either two to three days before ovulation or on the day the woman ovulates.
For a girl, a couple should have sex two or three days before ovulation or on the day of ovulation to increase their odds of having a girl.
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.
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.
Dr Michael Thomas MD (fertility specialist) actually advises that there are no methods to affect the sex of your child, including sexual position.
My general response is that it's a 50/50 chance that a woman will have a boy or a girl. But that's not exactly true – there's actually a slight bias toward male births. The ratio of male to female births, called the sex ratio, is about 105 to 100, according to the World Health Organization (WHO).
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.
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.
Age, Stress, And Family History Can Be Factors
Parents who have already given birth to other children also experience increased odds of becoming pregnant with a girl. (Though the impact of both of these factors are small.) And some of it might be in your genes.
My general response is that it's a 50/50 chance that a woman will have a boy or a girl. But that's not exactly true – there's actually a slight bias toward male births. The ratio of male to female births, called the sex ratio, is about 105 to 100, according to the World Health Organization (WHO).
Sex determination of a baby happens during fertilization, and it can't change during your pregnancy.
When sperm are inside women's body, they can live for up to 5 days. If you're a man and you have sex even a few days before your partner ovulates, there's chance they may get pregnant.
The Y-chromosome-carrying sperm are said to:
die faster than the X-chromosome-carrying sperm.
Also taking foods that are rich in alkali such as whole fruits and vegetables; this is because such foods favor the Y chromosome and thus, tend to survive much longer and swim faster.
The chances of an error with ultrasound are up to 5 percent, says Schaffir. An ultrasound can be between 95 to 99 percent accurate in determining sex, depending on when it's done, how skilled the sonographer is and whether baby is in a position that shows the area between their legs. Mistakes can also be made.
A study published Monday suggests prenatal stress in pregnant women may affect the sex of the baby and be associated with some forms of birth complications. Researchers at Columbia University and NewYork-Presbyterian Hospital found that stressed mothers are less likely to give birth to a male child.
They found that the most fertile months for conceiving a boy were from September to November, while the lowest fertile period was from March to May.