I'd like some other opinions please...Vet school and family?

I'm planning on attending vet school in the near future (hopefully Fall 2011), but I'm having a bit of a dilemma with my parents as to how "my life timeline" will lay out. Now, I've been with the same guy for about 2 years and we both agree that this is it.

Here's the thing though: My dad for some reason is soooo concerned about where getting married and having kids fits in around vet school. He thinks I shouldn't get married until I'm completely done with school...yes that means until I'm a certified DVM. He then worries that I can't have a kid right out of grad school, and still have a job, because he thinks I should stay home with a baby until they start school. Now don't get me wrong, I'd love to be a stay-at-home mom, but helping animals is my calling. So he says well you've got to get the job straightaway, THEN you can start a family. Because it's too hard to have the family and then do vet school, and it's too hard to get a job more than a year out of vet school.

Your opinions on all this? The thing that's bothering me so much is that my dad's opinion makes sense to me, but that might mean I'm about 28 before I start my family (the kids part that is). I know you'll say there's nothing wrong with that, but I always planned to be younger than that when I had my first kid. Anyone who went to grad school have an opinion on maybe starting the family DURING grad school? My cousin is in her first year of a masters program and is pregnant, and I can't really see a problem, so long as financially we could support a baby and see that it's well taken care of. My boyfriend has no problem with that (given being in a financially stable situation). Any vets with opinions on timing? I'm worried that I couldn't during the 3rd and 4th years of school due to clinical rotations...wouldn't I have to skip certain rotations due to things like infections or xray danger for a fetus?

Thanks in advance for any helpful answers.