Transgender is a broad category referring to anybody whose gender identity, the gender they psychologically feel like they are, doesn't match their assigned sex, the gender defined by their physical traits.
Cisgender and cissexual are the same thing. It is the opposite of transgender. While a transgender person disagrees with their assigned sex, a cisgender/cissexual person identifies as their assigned sex.
Answer:
ovum fusing with sperm will give zygote (fertilization)
The zygote later on develops to an embryo in the womb after implantation.
