Actually you'd be surprised that we have two sexes as you do. However, we are an oviparous species(egg layers). Each female can lay up to three eggs per reproductive cycle although its not unheard of for some females to lay as many as 6 and before we abandoned religion, we had a specific female deity(probably based on someone real) that is said to have laid up to 30 eggs. Most Martians think its ridiculous but our historians are still trying to determine if there is any truth to this legend.

Also, despite having two sexes, our species is capable of asexual reproduction but only the females can do this.