Nipples are the external opening of the mammary glands.
Yes they do
Boy guinea pigs don't have nipples.
Yes they do my two girls are both 23weeks and they have nipples :)
yes, females yes, females
Guinea pigs (both male and female) have 2 nipples on the lower abdomen.
No, as both boars and sows have nipples. The only way to determine gender is by the reproductive organs themselves.
The external auditory aperture is present in fetal pigs. This organ is the eventual opening for the auditory lobes in adult pigs.
after being pregnant for a couple of weeks
A pig has as many nipples as the litter they will have. If they have 10 nipples they will have 10 pigilets per litter Not always the norm. They can have 6-12 nips. and maybe 1-6 babies, as in the case with Micro pigs. A Micro pig breeder will NOT usually breed a Micro with less than 10 nipples. This is just a standard. Some breeders will not breed sows with narrow hips,either.
a female guinea pig has nipples and milk glands but it is not called boobs.
pinnae
Average pigs have 10 to 12 teats, some as few as 8 teats. Good breeder pigs have 14 teats. Superior breeder pigs have 16 teats.