Chung GS, Lawrence RE, Rasinski KA, et al. Obstetrician-gynecologists' beliefs about when pregnancy begins. Am J Obstet Gynecol 2012;206:132.e1-7.

Exeter Clinical Laboratory International, Royal Devon University Healthcare NHS Foundation Trust, hCG (Human Chorionic Gonadotrophin, Blood Sciences Test,

https://www.exeterlaboratory.com/test/hcg-human-chorionic-gonadotrophin/ [Accessed: Jan 2024]

Mount Sinai, hCG Blood Test – Quantitative, https://www.mountsinai.org/health-library/tests/hcg-blood-test-quantitative [Accessed: Jan 2024]

NHS, Emergency contraception (morning after pill, IUD), Your Contraception Guide, https://www.nhs.uk/conditions/contraception/emergency-contraception/#:~:text=emergency%20pill%20works-,Levonelle,of%20sex%20to%20prevent%20pregnancy [Accessed: Jan 2024]

NHS.2, You and your pregnancy at 1 to 3 weeks, Pregnancy Week-by-Week , https://www.nhs.uk/pregnancy/week-by-week/1-to-12/1-2-3-weeks/ [Accessed: Jan 2024]

Taguchi R, Sato K, Adomi S, Tanaka N, Tamura H, Tamura T. Acupuncture and Laser Acupuncture as Treatments for Emotional Distress in Infertile Women in Japan. Med Acupunct. 2019 Dec 1;31(6):372-378. doi: 10.1089/acu.2019.1344. Epub 2019 Dec 13. PMID: 31871525; PMCID: PMC6918527. [Accessed: Jan 2024]

Taylor, Attia, How long after sex does pregnancy occur?, Ask the Experts, Planned Parenthood, Oct 28, 2019, https://www.plannedparenthood.org/blog/how-long-after-sex-does-pregnancy-occur [Accessed: Jan 2024]

Tommy’s, Pregnancy Tests: How do pregnancy tests work, Getting Pregnant, https://www.tommys.org/pregnancy-information/planning-a-pregnancy/taking-pregnancy-test [Accessed: Jan 2024]

Tommy’s, Timing of Sex for Pregnancy, Getting Pregnant, https://www.tommys.org/pregnancy-information/planning-a-pregnancy/how-to-get-pregnant/timing-sex-pregnancy [Accessed: Jan 2024]

How soon after sex can I be pregnant?

“How soon after sex can I be pregnant?” and other post-coital questions. Answered by Unii.