There can be many reasons which can cause miscarriage within 24wks... One is incompetent cervix.. Placenta abruption.. Low or no aminotic fluid.. Major dusability in baby which can be seen in u/s... Problem with uterus... Untreated infections... Major trauma such as accident etc... Blood or genetic problems... Unexplained reasons....
However with technology these days it is possible to save baby after 24wks if he is aliv3. Which is depend on how good care has been provided and also what condition baby is in...
But our question remains same that will u tell us what u found out at ur u/s or u r just asking for information??!
To answer your question I had a miscarriage at 23 weeks due to an incompetent cervix. No scan or anything will tell you this will happen. The only way you know if u have one is if it happens. Good news is for the rest of your pregnancies there is a way to prevent it from happening again
My sistet inlaw lost her baby at 29 weeks she had to give birth to the baby. Everythinf seemed good at the scan an they couldnt explain wgat happened. They dont always have answer. What happened at ya scan?? Hope all is well.