1) The 49th day is the only day to count without a Bracha.
2) The 49th day is the only day to count with a Bracha
Answer: הלכה ולא למעשה
1) The Ben Ish Chai writes " On the 49th day when saying the לשם יחוד before Sefirah, one should skip the words
of שבע שבתות תמימות. If one said it he can't make a Bracha." (only on the 49th day)
2) The Mishna Verura quotes the Halichos Shlomo "women should not make a Bracha for Sefiras Haomer
because a) they tend to forget to complete the counting and b) they don't understand the פירוש המילים."
If a Bais Yakov graduate counted the first 48 days, there is no reason for her not to make a Bracha on
the 49th day אמבצי