The Ramzi theory suggests that the gender of a fetus can be seen as early as 6 weeks by looking at which side the placenta develops. According to the theory, if the placenta develops on the right you are likely to have a boy and if the placenta is on the Left then you are likely to have a girl.
The position of the placenta can be determined by an ultrasound (usually at the 12 week and the 20 week scans). Most commonly the placenta is located at the top of the uterus (also called the fundus). Other locations include: anterior (front wall)
The Ramzi method is not proven to work, so there's only a 50 percent chance that the results will be accurate. As tough as it is, it's better to wait until a later ultrasound to confirm if your little one is a boy or a girl.
There is no relationship between placental location and fetal gender. Ultrasound assessment of genital tubercle is a more useful tool for prediction of fetal gender in early pregnancy.
When doing an ultrasound to determine the sex of your baby, an ultrasound technician will actually look for girl genitalia—labia and clitoris. 2 When these are seen, it is often referred to as the "Hamburger Sign." The clitoris situated between the labial lips looks like a hamburger between two buns, or three lines.
They found that 97.2% of male fetuses had a placenta on the right side of the uterus during the early ultrasound at 6 weeks, while 97.5% of fetuses had a placenta on the left side of the uterus.
Most ultrasounds that you're going to use in a clinical setting will have a mirror-like effect. This happens when the left side of the body shows up on the left side of the screen.
Ramzi Theory Explained
Ramzi theory suggests that a healthcare provider can use ultrasound images to detect the fetus's gender as early as six weeks' gestation. If the placenta implants on the right side, the baby's sex is male. If the placenta implants on the left side, then the baby's sex is female.
Although each pregnancy is different, you can expect the placenta to take over around weeks 8 to 12 of pregnancy, with 10 weeks being the average time for most women. This doesn't mean that your own hormone production and nutrition aren't important.
The placenta attaches to the wall of your uterus, and its position can be anywhere — front, back, right, or left. If the placenta attaches to the back of the uterus, it's known as a posterior placenta. If it attaches to the front of the uterus, it's called an anterior placenta. Both types are common.
Usually the placenta positions itself at either the top or side of the uterus. But it's always possible that the placenta will attach to the front of the stomach, a position known as an anterior placenta. If the placenta attaches to the back of the uterus, near your spine, this is known as a posterior placenta.
It Will Be in Colour
The pictures you see during a 3D ultrasound will appear in colour rather than in black and white. Your baby will appear as pinkish or flesh coloured on a dark background. However, it is worth pointing out that the colour you see isn't actually taken from your baby's skin tone.
The only way of knowing for certain that your twins are identical is if, on an ultrasound scan, the ultrasound tech can see that your babies share an inner sac (chorion) with no dividing membrane (called monochorionic/monoamniotic). This means they are definitely identical.
You may be told the results of your scan soon after it's been carried out, but in most cases the images will need to be analysed and a report will be sent to the doctor who referred you for the scan. They'll discuss the results with you a few days later or at your next appointment, if one's been arranged.
Bear in mind if you have an abdominal ultrasound, the results are mirrored. So if your placenta is on the right, that actually means it's on the left (indicating a girl). If your placenta is on the left, that means it's actually on the right (indicating a boy).
Nub theory, explained
Nub theory revolves around something called the genital tubercle, which forms early in pregnancy on the lower abdomen of your baby. Eventually this tubercle, or “nub,” turns into a penis in male babies and a clitoris in female babies.
If the nub is angled greater than a 30 degree angle in relation to the spine, it is likely a male fetus. If it is pointing straight out, under 30 degrees, or down, it is likely a female fetus!
It's all about Dad's genes
A man's X and a woman's X combine to become a girl, and a man's Y combines with a woman's X to become a boy. But if the sperm don't have equal Xs and Ys, or if other genetic factors are at play, it can affect the sex ratio.
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.
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.
Conclusions: Sleeping position in early pregnancy may influence placental implantation site. The probable mechanism may refer to the alterations in uterine perfusion which is induced by the change in systemic blood pressure and dominant sleeping position.
Retained placenta after vaginal delivery, which occurs in around 1–3% of deliveries, is a relatively common cause of obstetrical morbidity.