النبي محمد في التوراة والإنجيل- للباحث كريم عشماوي
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Finally ,The Secret of Determining the Baby’s Gender Is Revealed Prophet Muhammad ﷺ preceded modern science by 1,400 years
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The Secret of Determining the Baby’s Gender Is Revealed Prophet Muhammad ﷺ preceded modern science by 1,400 years — as always
The Prophet ﷺ revealed in his noble hadith a precise and astonishing secret:
“If the man’s fluid dominates the woman’s fluid, the child will be male by Allah’s permission; and if the woman’s fluid dominates the man’s fluid, the child will be female by Allah’s permission.”
This hadith clearly explains the interaction between sperm and the ovum, as well as the surrounding biological environment, and how the dominant fluid determines the baby’s gender. Modern science verifies today that factors such as the chemical nature of the vagina, viscosity of its fluid, the precedence of timing, and control over the reproductive environment — are all critical in this race.
First: The Essential Foundations to Understand This Article
Each month, the ovary in a woman emits a single ovum which moves from the corpus luteum into the fallopian tube, becoming fully ready for fertilization.
The ovum always carries one X chromosome.
Meanwhile, the man’s semen contains two different types of sperm:
**Y-type sperm (male):
lighter in weight, faster in movement, but less tolerant of acidic environments.**
**X-type sperm (female):
heavier, slower, but more resistant to acidity and higher viscosity.**
The gender of the baby is determined by the sperm that reaches the ovum first.
If a Y sperm reaches it, the child will be male (XY). If an X sperm reaches it, the child will be female (XX).
The natural environment of the vagina is acidic, with an average pH ranging between 4.5 and 6, which serves as protection against germs and infections. However, just before ovulation, the vagina produces alkaline, transparent, slippery secretions with lower viscosity, preparing for sperm survival. After ovulation, these secretions gradually become thicker and more acidic.
Second: Scientific Interpretation of the Hadith When the Man’s Fluid Dominates (Before or During Ovulation)
If intercourse takes place before the ovum appears or settles in the fallopian tube, the vaginal secretions during this time are usually transparent, slippery, and alkaline — supporting the movement of the fast Y sperm.
These sperms then advance to the fertilization site, take full dominance, and one of them penetrates the ovum as soon as it settles — leading to a male child by Allah’s permission.
When the Woman’s Fluid Dominates (After Ovulation)
At this point, the ovum has already left the corpus luteum and settled in the fallopian tube, ready for fertilization — yet intercourse has not occurred. The female secretions now dominate the reproductive environment completely. With time, the viscosity increases and the pH becomes more acidic (around 6–6.5).
When intercourse happens after ovulation, the environment becomes unfavorable for Y sperm — most of them die. However, X sperm survive better and endure this condition. Additionally, the ovum itself naturally leans toward the X chromosome, as it carries the same type inside it.
Therefore, the entire biological process becomes facilitated toward conceiving a female — by Allah’s permission.
The true wonder lies not only in today’s discoveries — but in how a man more than 1,400 years ago was able to summarize such sensitive biological details in a short, miraculous hadith. The Prophet ﷺ did not speak of chromosomes, acidity, alkalinity, timing, viscosity, or sperm endurance — yet he pointed to all of these facts with incredible accuracy and clarity.
How could a man know this unless he were a Prophet sent by Allah, inspired with knowledge beyond his era and environment?
Thus, the hadith is not merely a religious text — it is pure scientific miracle, preceding modern research by centuries, harmonizing science and faith in an undeniable way, and confirming the wisdom and eloquence of Prophet Muhammad ﷺ, which continues to amaze scholars even today.
Third: Practical Applications for Determining the Baby’s Gender
Accurate determination of ovulation:
Vaginal secretions are transparent, flowing, and alkaline before ovulation — this period is more favorable for conceiving a boy.
After ovulation, secretions become thicker and more acidic — a state more suitable for conceiving a girl.
Basal body temperature rises by approximately half a degree Celsius after ovulation — indicating that the environment is now more favorable to X sperm.
Home ovulation tests can detect a rise of the LH hormone around 24–36 hours before ovulation, which helps identify the fertile window precisely.
The presence of mild pelvic pain or breast tenderness — caused by the corpus luteum — can also indicate ovulation.
Tracking the menstrual cycle is useful: in a regular cycle, ovulation typically occurs between day 12 and day 16 from the beginning of menstruation.
Fourth: Nutrition and Its Effect on the Internal Environment
To increase the chances of conceiving a boy, it is recommended to enhance the alkalinity of the vaginal environment by consuming foods such as bananas, watermelon, leafy vegetables, and nuts. It is preferable to begin this dietary strategy at least seven days before ovulation to allow for gradual internal change.
To increase the chances of conceiving a girl, certain foods enhance acidity or contain higher levels of potassium — such as whole grains, berries, potatoes, and fish. Again, starting this nutritional change one week before ovulation may improve its effectiveness.
Fifth: Recommended Sexual Positions
For conceiving a boy, deeper positions with ejaculation close to the cervix give faster Y sperm the chance to reach the ovum first, before acidity increases.
For conceiving a girl, shallower positions after ovulation allow X sperm to dominate in a thicker, more acidic environment, which they can tolerate better than Y sperm.
Sixth: Practical Conclusion
The gender of the baby depends on multiple factors:
the timing of intercourse, the internal vaginal environment, the level of viscosity, the degree of acidity or alkalinity, the type of nutrition before and after ovulation, and the proper sexual position.
Before ovulation, the vaginal environment tends to be alkaline — favoring the rapid movement of Y sperm, which increases the likelihood of conceiving a male child.
After ovulation, the environment becomes acidic and viscous — favoring the survival of X sperm, which may result in conceiving a female child.
Seventh: Scientific References
The Shettles Method (Shettles Theory)
One of the most well-known natural approaches to gender selection, developed by Dr. Landrum B. Shettles in the 1960s. It is based on the assumption that Y sperm are faster but more fragile, whereas X sperm are slower but stronger and more enduring.
This theory suggests methods involving timing of intercourse, sexual positioning, and control of vaginal acidity to increase the chance of conceiving a specific gender.
Influence of Vaginal Environment
Scientific studies indicate that an acidic vaginal environment may favor X sperm — increasing the likelihood of conceiving a female — whereas an alkaline environment may favor Y sperm — increasing the likelihood of conceiving a male.
Differences Between X and Y Sperm
Research confirms that Y sperm are quicker but more delicate, while X sperm are slower but more resistant.
Effect of Nutrition
Some studies suggest that foods high in sodium and potassium may increase the chances of conceiving a boy, whereas foods containing higher levels of calcium and magnesium may increase the chances of conceiving a girl.
Effect of Timing of Intercourse
According to the Shettles Method, intercourse that occurs near ovulation may increase the chances of conceiving a male. Intercourse that occurs several days before ovulation may increase the chances of conceiving a female.
Conclusion
There is no deity but Allah — and Muhammad is the Messenger of Allah.
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