Is it permissible to pray for the fetus to be male after the ultrasound in the seventh month showed it to be female? And is that considered an objection to God's decree?

If the test result does not provide certainty about the gender of the unborn child, then supplication is permissible because the test can be mistaken, and it is permissible for a Muslim to ask Allah for everything that concerns him. However, if the result indicates certainty, then supplicating to change the gender is considered an transgression in supplication, and a Muslim should be content and submit to Allah's decree and destiny.