A baby is born

they will now think that you know very well How a baby is made: man meets woman, they have sex and nine months later a baby comes out! But do you know exactly where sperm and eggs come from? Read on to learn the fascinating biological details of a child's birth.

Inside the Female Body: How an Oocyte Treats

For women, the ability to conceive begins in the ovaries, in the two small oval organs anchored on either side of the uterus. Every girl is born with more than a million eggs in the ovaries, until puberty, about half of the existing oocytes, ie just under 500,000, died. About 400 will mature. This starts with the first period and ends when women enter the menopause, which generally occurs between the ages of 45 and 55.

Every month, halfway through your menstrual cycle (usually between the 12th and 16th day), an ovum has matured in one of your ovaries. This dissolves from the ovary and is quickly caught by the tulip-shaped opening of the nearest fallopian tube (these are two 10 cm long tubes leading to the uterus). This detachment is called ovulation.

An ovum is viable for about 12 - 24 hours, so it needs to be fertilized quickly for a baby to develop. When the ovum meets a healthy sperm on its way to the uterus, the two can merge and create a new life. But if this is not the case, then the ovum ends up in the uterus, where it decays and is repelled about two weeks later, during the period.

Inside the Male Body: The Origin of a Seed

While the female body deals with the maturing of a single egg cell at a leisurely pace of one month, the male body is almost constantly busy producing millions of microscopic sperm, whose only purpose in life is to swim and penetrate an egg.

Women are born with all the eggs they ever need, but men have to produce sperm regularly in their adult lives. From creation to completion of a new sperm cell, it takes 64 to 72 days, and since about 250 to 300 million sperm are released during each ejaculation, this sperm factory man has to work at high performance.

The production of sperm begins in the testes, the two glands that are housed in the scrotum below the penis.The testicles are hanging outside because they are very sensitive to heat. To produce healthy sperm, they need a mild 34 degrees Celsius - about four degrees cooler than normal body temperature. The sperm produced are stored in the epididymis until they pass through the vas deferens just before ejaculation and are mixed with the seminal fluid.

Despite the millions of sperm that are produced and released on each ejaculation, only one seed can fertilize an egg. The baby's sex depends on the type of sperm that first lodges in the egg - sperm with a Y chromosome results in a boy, and sperm with an X chromosome a girl. There are many old tales about how boys or girls are born, some of which are even supported by scientific evidence. Ultimately, however, the gender of a child is determined randomly.

What happens during sexual intercourse?

The big moment has come and you have sex with each other. In addition to all the fun, your body builds up some tension that hopefully discharges into an orgasm. This wonderful, pleasant release also has an important biological role. In men, the orgasm drives with about 20 km / h sperm-rich seminal fluid in the vagina and up to the cervix. This gives the sperm a good start on the way to the egg.

The peak in the woman also contributes to successful fertilization. Some studies have shown that the wave-like contractions associated with orgasm pull the sperm deeper into the cervix (the sperms are sucked in, so to speak). So get started and have as much fun as you can! This can only increase your chances of getting pregnant.

Many couples wonder if there is a particular sexual intercourse position that works best to get pregnant. Nobody knows that exactly, but some experts believe that the missionary position (the man lies above) or a tergo, the doggy style (the man is behind the woman, both look in the same direction), are the best for they let one deep penetration too. However, the most important thing about having sex is that you both feel comfortable with it and that you often have sexual intercourse so that during ovulation, viable sperm are present in the reproductive organs of the woman. That means you should have intercourse at least every other day in the middle of your cycle.

While you relax, the sperm job starts

Fertilization usually happens in the first hours after intercourse. So you can not do much to help but keep your fingers crossed and hope. Some experts claim that the woman should stay on her back for at least 20 to 30 minutes (with a pillow under her buttocks), so that the gravitational force facilitates the sperm's way to the egg.

While you and your partner enjoy the cuddling after romping around, there is a buzz in your body. Millions of sperm are searching for the egg - and this is not an easy journey. The first hurdle is the acidic environment of your vagina, which can be deadly to sperm. Then there's the cervical mucus, which seems to be impenetrable, except on your one or two most fertile days, when it miraculously loosens up and lets some of the strongest swimmers through.

The sperm that survived to this point still have a long way to go. Overall, they must travel about 20 cm from the cervix through the uterus to the fallopian tubes. If you consider that you need about 6 minutes for 1 cm, that's a long journey. The fastest swimmers should have reached the egg after about 45 minutes, while the slowest will take up to 12 hours. If they do not find an egg in the fallopian tubes, they will stay there for up to 72 hours, some even longer.

The mortality rate of sperm is so high that only a few dozen make it to the ovum. The rest gets lost (maybe in the wrong fallopian tube) or dies on the way. For the lucky few who reach the egg, the race has not gone yet. You must now desperately struggle to penetrate the outer shell of the egg and get in first. If the toughest from the club has made it inside, the egg cell changes abruptly so that no more sperm gets into it. It works like a shield that surrounds the egg once the first seed has arrived safely.

And now the true miracle begins ...

The egg cell is fertilized within 24 hours by combining the genetic material of the semen with that of the egg cell to create a new cell that will divide quickly. This cell ball now moves on through the fallopian tube into the uterus. (There are also fallopian tube pregnancies when the embryo is implanted in the fallopian tube rather than in the uterus.) Fallopian tube pregnancy is not viable, the embryo usually needs to be removed in a surgical procedure to prevent damage to or destruction of the fallopian tube and a often associated with internal bleeding.) This final leg of the journey lasts another five to six days. Now about two weeks will pass before your menstruation stops and you will suspect you are pregnant.

If your rule does not work out, or if you've discovered one of the signs of pregnancy, you can take a pregnancy test to make sure there's something on your way. If so, congratulations and welcome to the beginning of another wonderful journey.

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