Sex test!!

Luis • My second baby is on the way!!! he/she will be bilingual and an athlete, I don't know what sport yet! :)
My wife wants to spend $120 in a test to know the baby sex! I told her to please wait 3 more weeks, and save the money to pay for diapers, and other things, I know it's her first baby... But we need to vote, so please help:
1. Wait 3 more weeks and save that money to buy other things.
2. Spend $120 and try to see the sex gender.
Honey time to vote!!!! Lol