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    pink loader
    fertility basics

    Know about Human Reproduction with Fertility - Phases of Natural Human Reproduction

    • 4.6   (7 Votes)

    Human reproduction is mainly divided into 3 phases such as Ovulation, Fertilization, and Implantation. Symptoms of ovulation are crucial as they signify fertile period in a woman. Signs of implantation specify that there is a positive pregnancy. You need to consult your fertility doctor to make sure that you take proper care during your pregnancy.

    Human natural reproduction is such an amazing yet complex process that seems miraculous. There are three main phases of human reproduction: Ovulation, Fertilization, and Implantation. (1)

    1. Ovulation:

    Each month when women get her ovulation cycle, several eggs begin to grow in both ovaries. Every egg grows inside of the structure called a "follicle." (2)

    Ovulation, Fertile Period

    The body triggers the ovulation period by releasing a hormone that is called luteinizing hormone. This hormone is measured in the urine about 12 to 24 hours prior to the release of the egg. If you want to detect your ovulation period then ovulation detection kits can be used to detect the LH surge that is the peak time in a woman's cycle when she is prepared to conceive. During the ovulation period, the follicle ruptures, and release the fluid which is contained inside and then releasing the egg. It is an important phase in fertilization.

    This egg then leaves the ovarian follicle and is captured at the end of the fallopian tubes. Then in the fallopian tubes, it will start to move slowly down the tube towards the uterus firmly. For a pregnancy to take place eggs first meet sperms while it is still held in the fallopian tube. Eggs must be fertilized within the next 36 hours or it will die.

    2. How does the sperm get to the egg?

    The sperm ejaculates from the man's penis via ejaculation and gets deposited in the vagina high up near the cervix. The sperm as soon as it gets to enter immediately begins swimming, and some will find their way straight to the cervix. It is an important phase in fertilization. (3)

    The sperm then starts their long journey towards the egg. Leaving from the cervix they enter the uterus straight. Once reached there, they swim towards the fallopian tubes. Once the sperm gets into the fallopian tubes they are free from the potential negative that can affect the woman's immune system. It is an important phase in fertilization.

    Fertilization, Reproduction

    3. Fertilization:

    Once the sperm gets entered in the egg, a very complex chain occurs over a period of a maximum 16 hours. The male and female's pronuclei move together hand in hand to the center of the egg and the amazing thing is, during IVF this can be seen down the microscope. It is an important phase in fertilization. (4)

    4. Implantation:

    At this phase, the embryo has been moving down towards the fallopian tubes, but one should know that at the blastocyst stage the embryo directly enters the womb. For the next few days, it will hatch out and begins to bury into the wall of the womb. It will grow positively and eventually form blood vessels connections with the mother. (5) This phase of connecting of the embryo with the womb wall is called "implantation" and implantation is another critical stage in getting pregnant.

    At this point of implantation, the embryo is continuously sending out the chemicals into the mother's bloodstream, and about 2 weeks from fertilization, the chemicals have reached to the level which will show the pregnancy test positive. 

    5. When should one seek help from a fertility doctor?

    Fertility, Reproduction

    As given above, there are several complicated steps that might occur for a pregnancy to result:

    • The woman ovulates a healthy, mature egg
    • The man produces sufficient healthy, swimming sperm
    • The sperm must reach the egg (6)
    • The egg must change its structure to become a fertilized embryo
    • The genetic material of the embryo must be correct
    • The embryo must divide correctly until it forms a blastocyst
    • The blastocyst must implant in the womb without being rejected

    Get a complete guide to effective natural fertility methods. You can also use a period tracking app to record your daily health parameters such as cervical mucus, BBT, sex position, cervix position and weight to track fertility in a more comprehensive way.





    Archana Dubey

    How can I evaluate my eggs? Is there any simple way to examine this?

    Sept. 30, 2018, 4:41 p.m. 5.0


    Ujjala Nallapa

    I cannot conceive as I have blocked fallopian tube. The only way I could treat this is by surgery.

    Sept. 11, 2018, 2:03 p.m. 4.5


    Simran Negi

    I track my ovulation days by Ela app as it's easy and accurate. We can find other options like analyzing cervical mucus, BBT and tracking your cycles.

    July 31, 2018, 1 p.m. 4.5


    Ayush Kumar

    Thanks for sharing this, It was a lot more informative article.

    Dec. 20, 2017, 12:57 p.m. 4.5


    Sakshi Agarwal

    I did not know about ovulation. It seemed like having unsafe sex results in pregnancy. But now I know that women can get pregnant in their fertile window only. Good stuff!

    Aug. 21, 2017, 2:06 p.m. 5.0


    Shrabani Saha

    Checking ovulation is also a crucial part to get pregnant. Fertile window is the best time to make love and get conceived. On an average, for a woman it occurs somewhere between days 10 and 17 of the cycle.

    Aug. 21, 2017, 2:04 p.m. 4.5


    Radhika Pal

    To improve your fertility for a healthy pregnancy make sure that you eat enough protein, iron, zinc, vitamin C, and vitamin D rich eatables. Deficiencies of nutrients may lead to lengthy menstrual cycles and ovulation may get disturbed.

    Aug. 21, 2017, 1:09 p.m. 4.5

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    It is not advised to self-diagnose or treat any medical condition or disease following the information given in this article. We insist you to consult a registered practitioner and never try to replace their advice or discontinue treatment in between by relying solely on the information obtained. External links to different websites as well as videos given on the website serve the purpose of sharing knowledge only. Ela being an Independent Medical Information platform is neither responsible nor guarantees the authenticity, reliability, and accuracy of these videos and websites in any way. We do not intend the information displayed here to be used for a medical emergency, if you seek medical attention for yourself (or any other person with whom you want to share the information with), we advise you to directly get in touch with the hospital or the doctor.

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