Undergraduate degree (BA or BS, 4 years)
Medical school (4 years)
OB/GYN residency (4 years)
Medical school is very competitive. You need good grades in college and a good score on your MCAT (Medical College Admission Test) to get in. You must also meet all the prerequisites of the medical school you are applying to, which usually includes at least one year of biology and two years of chemistry courses.
4-5 years of medical school
2 years of foundation programme
7 years of specialist training studying Obstetrics & Gynaecology
Your A Level and GCSE grades have to be very high to get into medical school because it is very competitive. Also to go to medical school you MUST do 2 Science A-Levels including Chemistry.
So that's like 13 years minimum in total, it's really long but bear in mind that majority of the specialist training is actually WORKING with professionals in the hospital.