There have been many claims that changing when you have sex or changing your sexual position
will help increase your chances for having a boy or a girl is this true stay tuned.
Today's video is about trying to use sex timing or sex position to conceive a boy. If you are
only interested in trying to become pregnant watch this playlist to learn about whether sex position
helps you get pregnant, how to optimize timing and use of vaginal lubricants. First a little
scientific background. In human beings, the gender of a baby is determined by the chromosomes.
Females have two X chromosomes and males have one X and one Y chromosome.
All of the eggs in a woman's ovaries contain an X chromosome. However, exactly one half of the sperm
from a man contains an X chromosome and one half contains a Y chromosome. After a couple has sex,
if a sperm with an X chromosome fertilizes an egg, the embryo produced will be female. If a sperm
with a Y chromosome fertilizes an egg, the embryo will be male. Since half of the sperm have a Y
chromosome, half of all embryos made will be male embryos. Some couples who have had
multiple children of one sex believe that the male only produces one kind of sperm or the other
this is not true. Those men still have equal amounts of each kind of sperm. When I do IVF on
those couples and test the gender of the embryos, it still comes out to be around 50% boys and 50%
girls. Let's look closely at an X chromosome and a Y chromosome. As you can see, the Y chromosome is
much smaller. Some people have claimed that this makes the sperm which hold a Y chromosome swim
faster but not survive as long. However, there's actually no evidence that X and Y sperm swim
at different speeds and there's no evidence that they survive differently so this theory is flawed
right from the start. According to the theory, if you have sex closer to the time of ovulation
or if your sexual position releases sperm closer to the cervix, which is the opening of the uterus,
then the faster swimming male forming sperm will be more likely to reach the egg and increase the
chances for a boy. Three studies have tried to test this theory. The first two studies came up
with opposite results. One said that the chance for a boy was increased and the other found the
chance for a boy was decreased. These studies had various problems which limited their accuracy.
However, this study of over 200 couples use highly accurate methods to determine the time
of ovulation and had couples keep a diary of when they had sex. No surprise. The timing of sex had
no influence on whether the couples had a boy or a girl. Need more proof? Okay. One method that
fertility doctors use to help couples get pregnant is called intrauterine insemination or IUI.
With this method, sperm are placed directly into the uterus at the time of ovulation. Based on
the sperm theory I talked about earlier, almost all of the babies born from IUI
should be boys because the timing of the IUI is exactly on the day of ovulation and because
the sperm are released closer to the egg than is even possible with intercourse. This study looked
at over 6 300 babies that were born as a result of IUI. How many do you think we're boys? 90%?
70%? Here are the results. Pretty close to 50% of the babies born were boys.
In other words, timing and position did not improve the chance to conceive a boy. If changing
position or timing didn't work, is there anything you can do to increase your chances for a boy?
The only guaranteed method is with IVF in which you can test the embryos
to see which are males or females. There is legitimate scientific evidence that
changing a woman's diet can help a little bit. Watch this video for more information about that.
One word of warning. Don't believe testimonials from websites or videos. Remember, about 50% of
babies are going to be boys so any method designed to increase the chances for a boy will work about
50% of the time. Hi I'm Dr Randy Morris. I give honest science-based tips that have helped people
all over the world have their rainbow baby. If you want to improve your odds for success,
hit that subscribe button right now it's like having a fertility specialist in your phone