Among the current legislators who served the term starting on 2013/1/3, how many of them are female?
term starting on 2013/1/3 refers to start = '2013-01-03; female refers to gender_bio = 'F';
SELECT COUNT(*) FROM current AS T1 INNER JOIN `current-terms` AS T2 ON T1.bioguide_id = T2.bioguide WHERE T2.start = '2013-01-03' AND T1.gender_bio = 'F'