The Timing of Implantation during pregnancy

 

Implantation | Behavior | MCAT | Khan Academy

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FERTILIZATION AND IMPLANTATION

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Recognizing implantation symptoms

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Implantation timing Implantation of a fertilized egg usually occurs about 6 to 10 days after conception. For a pregnancy to happen, the embryo needs to implant successfully into the uterine lining, which has become thicker for this purpose. Implantation is when the fertilized egg burrows into the uterine lining and begins to grow. 4  Implantation usually occurs between 6–10 days after the egg is fertilized. 5. So, if you have a 28-day menstrual cycle and ovulate on the 14th day, implantation would occur somewhere between day 20 and 24 of your cycle.

Implanting gives the blastocyst a blood supply so that it can start growing into a fetus. Along with cramping, you may experience what is called implantation bleeding or spotting. This usually. O ne of the most interesting questions in early pregnancy is when exactly does implantation happen?

Implantation happens on average 9.1 days after ovulation and fertilization with a range of 6-12 days (based on a study published in 1999 by Wilcox). What happens before implantation?Getting Pregnant. A Visual Timeline of Implantation. By Lindsay Meisel | Published Dec 1, 2016 | Last updated Oct 24, 2018 Fact checked.

By Lindsay Meisel | Dec 1, 2016. Tags: implantation, luteal phase. Lindsay Meisel. Lindsay Meisel is the Head of Content at Ava.

She has over a decade of experience writing about science, technology, and. Implantation is often described as a window because it occurs about 8 to 9 days after fertilization, though it can happen as early as 6 days and as late as 12 days after ovulation. While many consider fertilization to be the start of pregnancy, successful implantation is the more crucial hurdle. What are the signs and symptoms of implantation?The timing of implantation bleeding is nearly same as menses.

Technically menses the must occur before period, but implantation can take longer. Implantation bleeding is the spotting due to egg embedment in the lining of the uterus. The early embryo causes the shifting of blood vessels of the endometrial lining. In most cases, implantation takes place around nine days after ovulation, but sometimes it may occur as early as seven days or as late as 12 days. So, if ovulation takes place on the 14th day after a period (average 28-day cycle), implantation might occur on the 23rd day.

During ovulation, the ovaries release the eggs. According to the American Pregnancy Association, the signs of implantation occur just before your next period. They say that implantation signs are usually noticeable 10 to 14 days after ovulation.

2 Therefore, it’s easy to confuse signs of implantation with the onset of your menstrual period. It can be difficult to know exactly when implantation happens. A fertilized egg takes between 6 to 12 days after ovulation to implant itself in the uterine lining.

1. How soon after implantation you take the test. There needs to be enough concentration of hCG for a positive pregnancy test result.

List of related literature:

Implantation is a process that is limited in both time and space, begining 2–3 days after the fertilized egg enters the uterus usually on day 18 or 19 of the cycle (3 or 4 days after ovulation).130 Thus, implantation occurs 5–7 days after fertilization.

“Clinical Gynecologic Endocrinology and Infertility” by Marc A. Fritz, Leon Speroff
from Clinical Gynecologic Endocrinology and Infertility
by Marc A. Fritz, Leon Speroff
Wolters Kluwer Health/Lippincott Williams & Wilkins, 2011

On approximately day 5 or 6 after fertilization, the blastocyst enters the uterus, but implantation does not occur for another 1 to 2 days.

“Williams Textbook of Endocrinology E-Book” by Shlomo Melmed, Kenneth S. Polonsky, P. Reed Larsen, Henry M. Kronenberg
from Williams Textbook of Endocrinology E-Book
by Shlomo Melmed, Kenneth S. Polonsky, et. al.
Elsevier Health Sciences, 2011

Implantation of the fertilized egg in the uterine lining begins around day 5 after fertilization, and implantation is usually complete by day 14.

“Pharmacology for Women's Health” by King, Tekoa L. King, Mary C. Brucker
from Pharmacology for Women’s Health
by King, Tekoa L. King, Mary C. Brucker
Jones & Bartlett Learning, 2010

Implantation generally occurs 5–6 days after ovulation and fertilization (A is therefore incorrect), at which time the embryo is at the blastocyst stage (B is therefore incorrect).

“Essential Obstetrics and Gynaecology E-Book” by Ian M. Symonds, Sabaratnam Arulkumaran
from Essential Obstetrics and Gynaecology E-Book
by Ian M. Symonds, Sabaratnam Arulkumaran
Elsevier Health Sciences, 2019

This process of implantation begins on the late sixth or early seventh day after fertilization and is completed on the eleventh day.

“A Textbook of Neuroanatomy” by Maria A. Patestas, Leslie P. Gartner
from A Textbook of Neuroanatomy
by Maria A. Patestas, Leslie P. Gartner
Wiley, 2016

A careful study of women attempting to conceive documented that the first hormonal evidence of implantation (the appearance of hCG) occurred on 8, 9, or 10 days after ovulation; the earliest was 6 days and the latest 12 days.”

“Clinical Gynecologic Endocrinology and Infertility” by Leon Speroff, Marc A. Fritz
from Clinical Gynecologic Endocrinology and Infertility
by Leon Speroff, Marc A. Fritz
Lippincott Williams & Wilkins, 2005

If an egg is fertilised soon after ovulation (within hours) it will take the zygote about 5–6 days to reach the uterus and another day to become embedded in the endometrium (implantation) and produce sufficient hCG to establish the pregnancy.

“Understanding Pathophysiology 3e Australia New Zealand” by Judy Craft, Christopher Gordon, Sue E. Huether, Kathryn L. McCance, Valentina L. Brashers
from Understanding Pathophysiology 3e Australia New Zealand
by Judy Craft, Christopher Gordon, et. al.
Elsevier Health Sciences Division, 2018

After reaching the uterus, the developing blastocyst usually remains in the uterine cavity an additional 1 to 3 days before it implants in the endometrium; thus, implantation ordinarily occurs on about the fifth to seventh day after ovulation.

“Guyton and Hall Textbook of Medical Physiology E-Book” by John E. Hall
from Guyton and Hall Textbook of Medical Physiology E-Book
by John E. Hall
Elsevier Health Sciences, 2010

Spotting due to bleeding at the implantation site occurs from the time of implantation (about 6 days after fertilization) until 29 to 35 days after the last menstrual period in many women.

“Conn's Current Therapy 2019” by Rick D. Kellerman, David Rakel
from Conn’s Current Therapy 2019
by Rick D. Kellerman, David Rakel
Elsevier Health Sciences, 2018

Implantation generally occurs approximately 5 to 7 days after fertilization.

“Sabiston Textbook of Surgery E-Book” by Courtney M. Townsend, R. Daniel Beauchamp, B. Mark Evers, Kenneth L. Mattox
from Sabiston Textbook of Surgery E-Book
by Courtney M. Townsend, R. Daniel Beauchamp, et. al.
Elsevier Health Sciences, 2012

Oktay Kutluk

Kutluk Oktay, MD, FACOG is one of the world's foremost experts in fertility preservation as well as ovarian stimulation and in vitro fertilization for infertility treatments. He developed and performed the world's first ovarian transplantation procedures as well as pioneered new ovarian stimulation protocols for embryo and oocyte freezing for breast and endometrial cancer patients.

Mail: [email protected]
Telephone: +1 (877) 492-3666

Biography: https://medicine.yale.edu/profile/kutluk_oktay/
Bibliography: oktay_bibliography

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10 comments

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  • Congratulations,keep calm❤ you very hyped up,there is no way to prepare your body God gives to those who he so wishes too.
    Im a mother of 4 trust me.❤

  • I’m 10 OPD and the wait is driving me mad. Had a miscarriage back in November so fingers crossed this time round. Will be my second baby and I’m so ready for this. Do I need to wait till I miss my period on Monday or can I test before?

    Any advice and help would be greatly received xx

  • Hi my period started on aug 4 until aug 11 now i have bleeding sep 1 is this what you called implantation bleeding? Please help thank you and new subscriber here ��

  • Still looking for a video that explains the timeline of having sex, the sperm travelling, how much time passes while that happens and while they wait for the egg to release of what they do if the egg is already sitting there for 24 hours and if it really is 24 hours or longer/shorter per woman. Why won’t anyone write a decent book about this?

  • I’m having implantation bleeding… I bought a pregnancy test.. came out negitive during implantation bleeding. If I go to the doctor and get a blood pregnancy test, can they tell if I’m pregnant that early??? Thanks

  • You seriously have the best videos ever�� I’m into my TTW after losing our rainbow baby at 14 weeks on my birthday this year.. Fingers crossed bc I’m getting all the signs ����

  • Absolutely LOVE the way you teach!! IThese Khan Academy videos really help me… but this professor is one of my favorites! I love the way you teach! I was so overwhelmed by this topic and all the terms! You really made it stick!!! Thank YOUUUU!

  • This was the most informative and fun video that I have watched. As you described the Weeks, I had to pull out my calendar to learn through my notes. You definitely helped me understand what happens each week in the cycle. Thank you.

  • Hi I had a period on March 19 and bled for 6 days. I have not seen my period for April yet. I’ve taken test since the beginning of the supposed start of my best period and all have been negative!! Just this morning April 21 2020 I took one n negative. So if I what’s going on!! Any help

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