I had asked a question on when the sex is determined and all of you said at the time of conception ok now with

Sex is determined at the time of conception. It depends on whether a male or female sperm is the one doing the fertilising. Both male and female foetuses are exactly the same up to the 12 week point. And guys won't like this, but we all start out as female (which is shy men have nipples!)!! At 12 weeks gestation the male hormones start being produced and the parts start becoming what they will become. Sometimes, if there is a bit of a mix up in the hormones, or a mutation, or just a not-quite-right sperm, the cells get confused as to what they are supposed to be and we get hermaphrodites. And yes, they DO exist.

It depends on the person as to whether they become male or female. Some just feel they are female, others are inherently male. There have been instances where the parents have had the male parts surgically removed when the poor little thing was a baby, and treat her like a girl her whole childhood, giving her a girl's name etc, only to have her grow up to be a man inside, with male habits and personality traits.

It is pretty rare, though, cos nature is basically fairly good at this sort of thing by now!!

I don't think there is any human that born with both sexual organs. There are some hoax about it but there isn't any proven case.

In the animal kingdom there are incdidentst that has that happened but those are lower liveform species.

Anyway, there are always deformation during pregnancy or the fertifilzation, so in principle anything can happened.

For a normal healthy fertilization, the sperm cell is the one causes whether the baby is male or female.

abnormal chromosomes.

you don't know their gender until they are older and they identify as one or the other. most people now wait to do surgey until the child is a pre/teen

If that happens, then it is because there is an abnormality of the chromosomes.