Egg meets sperm (article) | Embryology | Khan Academy
The development of a female's egg is much more complex than sperm production . Therefore, if the female's egg and male's sperm happen to meet at any point. Read and learn for free about the following article: Egg meets sperm. Conception: From Egg to Embryo. Take a journey with us from the moment a single sperm fertilizes an egg. From tiny egg to growing embryo, follow the.
This is why all mitochondria in humans are of maternal origin. Still, a considerable amount of RNA from the sperm is delivered to the resulting embryo and likely influences embryo development and the phenotype of the offspring. Their membranes dissolve, leaving no barriers between the male and female chromosomes.
Sperm Meets Egg: Weeks 1 to 3 of Pregnancy
During this dissolution, a mitotic spindle forms between them. The spindle captures the chromosomes before they disperse in the egg cytoplasm.
Upon subsequently undergoing mitosis which includes pulling of chromatids towards centrioles in anaphase the cell gathers genetic material from the male and female together. Thus, the first mitosis of the union of sperm and oocyte is the actual fusion of their chromosomes. Thus, they are genetically identical.
Fertilization age[ edit ] Fertilization is the event most commonly used to mark the zero point in descriptions of prenatal development of the embryo or fetus.
Artificial insemination with donor sperm - CPMA, Centre de Procréation Médical Assistée
The resultant age is known as fertilization age, fertilizational age, embryonic age, fetal age or intrauterine developmental IUD  age. The ideal time of fertilization is around ovulation when the egg is in the fallopian tube. Male Fertility After traveling through the vaginal canal, the strongest sperm make it to the cervix.
From here, the sperm must travel through the uterus and into one of the fallopian tubes. Since the human body functions to procreate, the egg that is released monthly from the ovaries waits for sperm cells in the fallopian tube for about a day.
Additionally, sperm can survive in the female reproductive track for up to 5 days.
This union of egg and sperm creates a zygote fertilized egg and this new zygote cell has a core of 46 chromosomes 23 from the sperm and 23 from the egg. Embryonic Development This new zygote cell begins to divide rapidly over the next few hours through a process called mitosis, and this expanded bundle of cells is now called an embryo.
If the fertilizing sperm has a Y chromosome, the embryo will develop into a male baby, while a fertilizing sperm with an X chromosome will develop into a female baby.गर्भ में स्पर्म्स अंडे तक कैसे पहुंचते हैं Pregnancy Process in Hindi - Sperms meet egg
Implantation By the time the fertilized egg reaches the uterus, it is a cluster of about cells, and it forms a blastocyst. Simultaneously, the lining of the uterus gets thicker, and the cervix is closed off with a mucus plug that will stay in place until the end of the pregnancy term.
- Human fertilization
- Cell structure
- Artificial insemination with donor sperm (DI)
Around the time of implantation, some females may notice spotting light bleedingwhich should only last about 48 hours. This irregularity is called an ectopic pregnancy and it can be very dangerous.
In these cases, the female will either need to take medication to stop the embryo from growing, or have surgery to prevent the fallopian tube from rupturing. Detection Naturally, about half of all fertilized eggs are lost before a female even knows that she is pregnant.
This loss could be due to many reasons, including the blastocyst implanting but not growing, or the blastocyst growing but ceasing development.
Concluding Remarks If a female misses her period or notices other pregnancy symptomsa home pregnancy test can be purchased at a local drugstore. It is wise to wait a sufficient amount of time about one week after a missed period to take a home pregnancy test. It is also recommended to repeat the test in case of a false positive or false negative.
For some females, a positive pregnancy reading is exciting news, while other females might not be ready to have a baby or never wish to. Those faced with an unwanted pregnancy may have several options, such as aborting the pregnancy or carrying the fetus to term and considering adoption or raising the child. Although the fertilization steps included in this article focused on natural processes of conception, there are similar steps of implantation and detection associated with pregnancy occurring through insemination or other fertility treatment options.