Europe was undertaken by women; from the mid 18th century onwards, medical monitoring of pregnant women started to require rigorous formal education, to which women did not generally have access, and thus the practice was largely transferred to men). Writing was generally also considered acceptable for upper-class women, although achieving success as a female writer in a male-dominated world could be very difficult; as a result of several women writers adopted a male pen name (e.g. George Sand, George Eliot). Women have been composers, songwriters, instrumental performers, singers, conductors, music scholars, music educators, music critics/music journalists and other musical professions. There are music movements, events and genres related to women, women's issues and feminism. In the 2010s, while women comprise a significant proportion of popular music and classical music singers, and a significant proportion of songwriters (many of them being singer-songwriters), there are few women record producers, rock critics and rock instrumentalists. Although there have been a huge number of women composers in classical music, from the Medieval period to the present day, women composers are significantly underrepresented in the commonly performed classical music repertoire, music history textbooks and music encyclopedias; for example, in the Concise Oxford History of Music, Clara Schumann is one of the only female composers who is mentioned. Women comprise a significant proportion of instrumental soloists in classical music and the percentage of women in orchestras is increasing. A 2015 article on concerto soloists in major Canadian orchestras, however, indicated that 84% of the soloists with the Orchestre Symphonique de Montreal were men. In 2012, women still made up just 6% of the top-ranked Vienna Philharmonic orchestra. Women are less common as instrumental players in popular music genres such as rock and heavy metal, although there have been a number of notable female instrumentalists and all-female bands. Women are particularly underrepresented in extreme metal genres. Women are also underrepresented in orchestral conducting, music criticism/music journalism, music producing, and sound engineering. While women were discouraged from composing in the 19th century, and there are few women musicologists, women became involved in music education "... to such a degree that women dominated [this field] during the later half of the 19th century and well into the 20th century." According to Jessica Duchen, a music writer for London's The Independent, women musicians in classical music are "... too often judged for their appearances, rather than their talent" and they