Caveat Emptor

I realize this may be a biased forum to ask for this advice, but here goes... I've been an 1102 for almost 4.5 years and am a GS12. Within the next few months, I plan on applying within my organization for a PCO position with an unlimited warrant. It would be a promotion to GS13-equivalent but would also be supervisory, grueling, and stressful. I fear taking such a position would prevent me from taking part in any career development programs (Education with Industry, leadership programs, etc.) and I would feel bad leaving the other PCOs in the lurch to go on maternity leave (which will hopeful