IVF is usually referred to as in vitro fertilization, hysteroscopy is not mandatory prior to IVF, there will be individual differences affecting the ultrasound if it suggests abnormalities in the uterine cavity or repeated failed transplants then hysteroscopy is recommended.
For people with IVF, hysteroscopy is not necessary before transplantation. Many fertility centers now require routine hysteroscopy to assess the morphology of the uterine cavity prior to IVF. But having a hysteroscopy does not improve pregnancy rates.
For people who have a good uterine environment, hysteroscopy is usually not necessary before IVF, and there is a strong correlation between the success rate of IVF and a good uterine environment.
It is recommended that people who are undergoing IVF should take into account their own situation and determine whether or not to undergo hysteroscopy under the guidance of a professional doctor, which is not a mandatory item.