It's those other proofs I'm waiting on. But, the evidence is pretty good, all those blood levels, the ultrasound studies, the seemingly normal function of the uterine wall.
I didn't notice if uterine mucosa was highlighted and chemically analised. Did I miss that bit? A massive hormonal dose could change the pH of the lining and make sperm motility go way down but also cause an inhospitable environ for the embryo that might be there.