This hasn't happened to me, but to my SIL instead.
SIL has been feeling like she might be pregnant for a little while, but didn't stop getting her periods and has been on the pill so didn't take a pregnancy test until she started to get bigger in the belly.
She got her initial midwife appointment 2 weeks after calling with a positive test, where the midwife felt her belly and decided that she couldn't feel her uterus, so wrote down an estimate of 7 weeks. SIL insisted on getting a scan earlier than 5 weeks away, so the midwife reluctantly agreed to give her an appointment a few days later (today).
The scan confirmed that she is approximately 27 weeks along, literally 20 weeks further than the first midwife had said. Obviously a big shock for everyone in the family, and also for the staff at the hospital, if the first midwife hadn't written down in her notes 7 weeks they wouldn't have believed it.
How does a trained professional midwife manage to get it so wrong? Is it really that difficult to tell, does this sort of thing happen often? Or was this midwife just completely incompetent? My feeling is that SIL should put in a complaint about her and that she clearly needs retraining or something, or am I being too harsh?