Getting pregnant while already pregnanst is very rare, but not impossible. That is exactly what happened to Kate Hill, of Brisbane, Australia in 2015.
Ms Hill’s obstetrician, Dr. Brad Armstrong, told Australian news program Today Tonight that he had never seen anything like it. Dr. Brand said of this rare conception known as superfetation “I could not find any literature in the medical review websites at all” .
Getting pregnant while already pregnant is very unlikely, but not unheard of. In superfetation, a second foetus develops in the womb while one is already present. The foetuses are not twins; they develop in two different sacs within the womb. Ms Hill has been receiving hormones treatment to aid ovulation, as part of fertility treatment for a condition known as polycystic ovary syndrome.
Ms Hills said she and her husband, Peter, only had intercourse once during that 10-day period, that’s apparently all that is required. Sperm can survive for several days after sex, remaining in the cervix, uterus, and fallopian tubes. However, for a second pregnancy to occur, ovulation would have to continue after conception has taken place, which would allow another fertilised egg to attach to the womb.
Explaining superfetation, Dr Ibukun Adeyemo, obstetrics and gynaecology specialist and medical director of Overcomer Hospital, Iju in Lagos State said “Superfetation, defined as successive fertilization of two or more ova of different ovulation resulting in the presence of embryos of unlike
ages in the same uterus. It is a rare occurrence and I have never seen it in my 22 years of
medical practice, may be it is under diagnosed here in Africa by our sonologists”
Dr Adeyemoo added “I think the major suspects now should be fraternal twins (un-identical twins), attention need to be focused on them to increase possibility of diagnosing this phenomenon, and the best place, to achieve that is south west Nigeria, the Fraternal Twins capital of the
world. scientifically superfetation sounds impossible but there is a saying
in medicine “NEVER SAY NEVER” but for now the reason for this phenomenon is unknown, but is said to occur more frequently among those who took fertility drugs.”
Ms Hill and her husband peter had two daughters Charlotte and Olivia, delivered on the same day from Ms Hill’s superfetation. The girls who had due dates of 10 days apart, were delivered on the same day via Caesarean section.