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Implantation, also known as nidation, [1] is the stage in the mammalian embryonic development in which the blastocyst hatches, attaches, adheres, and invades into the endometrium of the female's uterus. [2] . Implantation is the first stage of gestation, and, when successful, the female is considered to be pregnant. [3] .
Implantation is when an embryo burrows into the uterine lining, where it can grow and release hormones. Learn about the possible signs of implantation, when it occurs and how to take a pregnancy test.
Dec 31, 2017 · Implantation is a highly organized process that involves an interaction between a receptive uterus and a competent blastocyst. In humans, natural fecundity suggests that the chance of conception per cycle is relatively low (~30%) and two-third of lost pregnancies occur because of implantation failure.
- Su-Mi Kim, Jong-Soo Kim
- 2017
Feb 19, 2024 · Learn what embryo implantation is, when it occurs and what factors influence it. Discover the four stages of implantation and the hormonal changes in the endometrium.
- Zaira Salvador
Jun 3, 2022 · Learn how your baby grows and develops during the first trimester, from conception to week 12. Find out what happens during implantation, the process of embedding the blastocyst into the uterine lining.
- Weeks 1 and 2: Getting ReadyIt might seem strange, but you're not actually pregnant the first week or two of the time allotted to your pregnancy. Yes, you read that correctly!...
- Week 3: FertilizationThe sperm and egg unite in one of your fallopian tubes to form a one-celled entity called a zygote. If more than one egg is released and fertilized...
- Week 5: Hormone Levels IncreaseThe fifth week of pregnancy, or the third week after conception, the levels of HCG hormone produced by the blastocyst quickly increase. This signal...
- Week 6: The Neural Tube ClosesGrowth is rapid this week. Just four weeks after conception, the neural tube along your baby's back is closing. The baby's brain and spinal cord wi...
- Week 7: Baby's Head DevelopsSeven weeks into your pregnancy, or five weeks after conception, your baby's brain and face are growing. Depressions that will give rise to nostril...
- Week 8: Baby's Nose FormsEight weeks into your pregnancy, or six weeks after conception, your baby's lower limb buds take on the shape of paddles. Fingers have begun to for...
- Week 9: Baby's Toes AppearIn the ninth week of pregnancy, or seven weeks after conception, your baby's arms grow and elbows appear. Toes are visible and eyelids form. Your b...
- Week 10: Baby's Elbows BendBy the 10th week of pregnancy, or eight weeks after conception, your baby's head has become more round.Your baby can now bend his or her elbows. To...
- Week 11: Baby's Genitals DevelopAt the beginning of the 11th week of pregnancy, or the ninth week after conception, your baby's head still makes up about half of its length. Howev...
- Week 12: Baby's Fingernails FormTwelve weeks into your pregnancy, or 10 weeks after conception, your baby is sprouting fingernails. Your baby's face now has taken on a more develo...
Learn about IVF, a complex series of procedures that can lead to a pregnancy for people with infertility or genetic problems. Find out how IVF works, what the risks are and whether it's right for you.
Jun 12, 2019 · Learn about the process, timing and factors of embryo implantation after in vitro fertilization. Find out how blastocysts attach and invade the uterine lining and what affects implantation rates.
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