sex

the state of being male or female, especially in relation to sexual reproduction and the physical characteristics that are typical for each sex

sexo (biológico)

• of a particular sex

Collocations male/female sex · sex differences

• The baby is due in two weeks, and we don't know the sex yet.

  El bebé está previsto para dentro de dos semanas y aún no sabemos el sexo.

sexual activity between people, especially when it is intended to be enjoyable and involves touching the sexual parts of each other's bodies

sexo (actividad sexual)

• have sex with somebody

Collocations sexual intercourse · sex life

• They had sex last night.

  Tuvieron relaciones sexuales anoche.

the scientific study of sexual activity and reproduction in humans or animals

sexología, estudio del sexo

• study the sex of something

Collocations sexual behavior · human sexuality

• She is studying the effects of hormones on human sex.

  Ella está estudiando los efectos de las hormonas en la sexualidad humana.