title: Delayed implantation. A case report.
abstract: In cycles in which conception takes place, serum human chorionic gonadotropin (hCG) becomes detectable between 8 and 12 days after ovulation. A delayed appearance of hCG has been reported in a limited number of cases, most of them ending in spontaneous abortion. We encountered a case of ectopic pregnancy characterized by a delayed appearance of hCG and accompanied by a complete, albeit temporary, halt in the steroidogenic activity of the corpus luteum. Although the patient was at risk of developing an ectopic pregnancy, the findings made an early diagnosis extremely difficult.
authors.affiliation: Department of Gynecology, University of Gent, Belgium.
authors.forename: C
authors.initials: C
authors.lastname: Beghin
authors.forename: M
authors.initials: M
authors.lastname: Dhont
authors.forename: E
authors.initials: E
authors.lastname: Merchiers
authors.forename: D
authors.initials: D
authors.lastname: Vandekerckhove
mesh_terms: D000328:Adult; D000714:Anastomosis, Surgical / Q000009:adverse effects; D001831:Body Temperature; D006063:Chorionic Gonadotropin / Q000097:blood*; D047108:Embryonic Development; D004958:Estradiol / Q000097:blood; D005260:Female; D006801:Humans; D010535:Laparoscopy; D011247:Pregnancy; D011274:Pregnancy, Tubal / Q000097:blood* / Q000175:diagnosis / Q000453:epidemiology; D011374:Progesterone / Q000097:blood; D012307:Risk Factors; D013246:Sterilization, Tubal / Q000009:adverse effects; D013997:Time Factors; D016216:Ultrasonography, Prenatal
chemical_list: D006063:Chorionic Gonadotropin; D011374:Progesterone; D004958:Estradiol