A nurse-midwife licensed under this chapter shall be known as a “licensed nurse-midwife” and no other person shall assume such title or use the abbreviation L.N.M. or C.N.M. or any other words, letters or figures which indicate that the person using the same is a licensed nurse-midwife. No person shall practice nurse-midwifery as defined in section 20-86a unless he is licensed under this chapter.