Can modern science now prove that our Intelligent Designer's "Purification After Childbirth" regulations found in Leviticus chapter 12 is  ?

The Old Testament no longer applies.......

Complete and utter horseshit nonsense from start to finish.

No, no one has proven there is an intelligent designer. In fact, whoever "designed" they eyes of humans, mammals, birds, fish, reptiles and amphibians would be fired if he/she works for a high tech company because it is a faulty design. There is a hole in the middle of the retinaa to allow the nerves to reach the brain. OTOH, the "designer" of the octopus's eye would still have his/her job because the nerves are placed on the back of the eye so the nerves can reach the brain without there being a hole in the eye. Because of the hole, our vision is not perfect. Our brain takes information from the area surrounding the hole and adds it to the signal received from the eye. So, our brain is acting like photoshop and making us see things that are not actually there. This is evidence that either there are two different designers or there is none at all. If there is a designer who designed humans according to his own image, then that means there is a hole in the eye of the designer too. People who believe in creationism and intelligent designer would have to explain why the designer is so dumb that he/she puts a hole in the eyes of humans and other vertebrates.

Modern science can't prove that there is/are intelligent designers other than ourselves.