Tah-MAH-lehs would be more accurate. ‘Females’, read as in Spanish, would be feh-MAH-lehs.
It’s easy, you read Spanish as if every vowel had that ‘h’. Vowels do not change their sound.
That’s a horrible explanation, right? Here. That’s how you always pronounce the vowels.
Spanish (native), English (fluent).
Edit: Me emociona leer que tantas personas están aprendiendo español 🫶…