We are first time parents. we visited a local ob/gyn in our area who confirmed we are 9 weeks pregnant. he has now booked a further blood test and 4d scan at 12 and 22 weeks plus another blood test at 16weeks. are these additional costs necessary?

Yes: Typically, there is a lot of blood work initially and there is blood work/ultrasound images at various stages of your pregnancy. First trimester ultrasound checks for nuchal translucency/ due date and second trimester ultrasound checks for fetal anatomy, placenta, fetal weight and so forth. Genetic testing (blood test to r/o Trisomy 13/18/21) can be performed during the first and second trimester.