In reply to Donna:
Not climbed when pregnant, but have been pregnant, so a few thoughts:
(i) If you'd like to ask a female doctor who climbs about this, I know one and could put you in touch.
(ii) Fiend, she won't have a bump to speak of at 13 weeks. But re bumps and climbing, remember a harness works by your having a waist and hips, that's why kids need a full body harness, once a bump is big enough to lose your waist, you'd need to make yourselfsafe against inverting byturning your harness into a fullbody with slings.
(iii) I wouldn't do it myself.
But then I have had four miscarriages, so got nervy being driven on bumpy roads for pete's sake!
(iv) Baby's are very well cushioned in their. I can't see how you could do any harm tootaling up easy stuff and being lowered off.
Good luck