Cual es?

Cual es?
 

¿Cuál es?

When you were pregnant did you crave anything?

¿Cuando estuviste embaraza tuviste algún antojo?
¿Cuando estabas embarazada tenía algún antojo?
¿Cuando estabas embaraza tuviste algún antojo?

Which type of past do I use?

Durante tu embarazo te dio ganas de comer algunas comidas especiales

All of them work. :D

Sometimes the imperfect and the preterite can be used idiosyncratically, and depend more on what the speaker has in mind than on a grammar basis.

estuviste/tuviste -> the pregnancy is over and the cravings have stopped. What did you crave in such moments.

estabas/tenías -> during pregnancy, were cravings frequent?

estabas/tuviste -> during pregnancy, what did you want at those moments of craving something?


Poli's suggestion works as well, and it could also be expressed with the imperfect.

Thank you. That's really clear. I think that's why I find it hard to know which past you use because often you can use both!!!!!