Implantation bleeding

Implantation bleeding is a small amount of vaginal bleeding that can occur in early pregnancy due to the fertilized egg attaching to the inside of the uterus.[1]Implantation bleeding occurs between 7 to 14 days after fertilization.[2][3]Implantation bleeding may be accompanied by symptoms such as cramping, nausea, breast tenderness, and headaches.[4]Implantation bleeding can be distinguished from period bleeding by color, clotting, strength of flow, and length of flow.[5][6]

However, there is no support for the notion that implantation produces vaginal bleeding.[7] Bleeding and spotting are common during the luteal phase of the menstrual cycle as well as during early pregnancy, and for reasons unrelated to implantation.

References
  1. editor, Eyal Sheiner (2011). Bleeding during pregnancy a comprehensive guide. New York: Springer. p. 9. ISBN 9781441998101. {{cite book}}: |last1= has generic name (help)
  2. "Is It Implantation Bleeding — or Just My Period?". What to Expect. Retrieved 2021-07-29.
  3. Rx, ReUnite (2020-12-09). "Implantation Bleeding vs A Period: How To Tell The Difference". ReUnite Rx. Retrieved 2021-07-29.
  4. Demosthenes, Erin Heger, Lauren. "What do implantation cramps feel like? How to tell the difference between implantation and menstrual cramping". Insider. Retrieved 2021-07-29.
  5. Aggarwal, Kiran (2020), Sharma, Alok (ed.), "Vaginal Bleeding in Early Pregnancy", Labour Room Emergencies, Singapore: Springer, pp. 155–161, doi:10.1007/978-981-10-4953-8_18, ISBN 978-981-10-4953-8, retrieved 2021-07-29
  6. "How Do I Know if It's Implantation Bleeding?". MedicineNet. Retrieved 2021-07-29.
  7. Weinberg, C. R.; Baird, D. D.; Wilcox, A. J.; Harville, E. W. (2003-09-01). "Vaginal bleeding in very early pregnancy". Human Reproduction. 18 (9): 1944–1947. doi:10.1093/humrep/deg379. ISSN 0268-1161. PMID 12923154.
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