I feel it was a number of things really, but the main reason was the birth of Elizabeth. In Fat Arse’s mind Anne had betrayed and lied to him, after all it was her promise of a son, that really made fat arse’s mind up concerning the divorce from K.O.A and the break from Rome.
If Anne had had a son instead of Elizabeth in 1533, he could stick two fingers up at the Pope and say “My God is better than your God, cause he’s sent me a son to show that this marriage is all good.”
Elizabeth’s birth had in some ways made him look as much as a laughing stock as it did during the Blackfriars trial. I wouldn’t say the known Catholic world would all laughing at him, but most of them were probably sniggering, in K.O.A’s case she probably felt a little justified that the birth of a daughter was entirely down her fault and may have felt some sympathy for Anne’s situation of bearing a girl instead of the longed for son.
Fat arse said he forgave Anne for Elizabeth’s birth, and perhaps he would have forgotten this little mistake (loosely worded) if she had gone on and had a healthy son or 2 who lived.
But with Anne’s miscarriages, I believe the one in 1534 ended around 7 months a boy named Henry Duke of Cornwall, if true the child may have lived for a few hours, this wouldn’t have helped the situation between Anne and Fat arse, as once again in Fat arse’s mind Anne would have betrayed and lied to him.
K.O.A’s death I believe affected Fat arse more than he let on, yes he and Anne made a big show of K.O.A’s death and dressed in bright yellow to celebrate the death of the so called Princess Dowager, but perhaps without meaning to Anne maybe went a little too far in her joyfulness at K.O.A’s death and fat arse felt narked that she should not show the respect due to a princess and daughter of Spain.
His fall and her miscarriage was really the end for Anne, even if she had gone on to have a son, I feel that like K.O.A before her Fat Arse would have by and large treated Anne the same way as he treated K.O.A, sleeping with her when he needed another child and wheeling her out when needed at diplomatic functions.
I believe the shock of fat arse’s jousting accident played a small part in Anne’s miscarriage in 1536 Anne of course blamed the whole thing on her odious slimy jumped up cretinous poppingjay uncle Norfolk, as he basically didn’t mince his words and told her “The king has been crushed by his horse and the doctor’s fear he will die” I believe she was frantic with worry but it wasn’t enough to cause her to miscarry, my personal belief is that perhaps one of her ladies, or even the odious, slimy, jumped up , cretinous poppingjay uncle Norfolk seeing her distress sent for an Apothecary to make her a posset to help her to calm down in that posset there may well have been some herb which may have caused her to abort the baby a few days later. Peony can cause uterine contractions I believe.