Cervical Mucus - the Biochemical and Molecular Properties in Fertile and Subfertile Women (C-MIS Study)
Cervical Mucus - the Biochemical and Molecular Properties in Fertile and Subfertile Women (C-MIS Study)
Infertility affects approximately one in six couples1. In approximately one third of cases,
 there is no cause found as to why a couple are unable to conceive2. In order for natural
 pregnancy to occur, sperm must pass through the cervix (neck of the womb) and swim to the
 woman's Fallopian tubes so that fertilisation of one of the woman's eggs can occur. It is
 known that mid-cycle mucus at the cervix is essential for sperm to gain access to the uterus
 and tubes.

 There is evidence that the composition of this mucus in women may affect fertility but this
 area has not been studied well in recent years, partly because fertility treatments such as
 IVF bypass the cervix.

 Research in sheep and cows in UCD has shown interesting differences in the cervical mucus of
 fertile and infertile animals. It appears that the mucus not only helps sperm to get to the
 uterus but may also help the sperm to mature and be ready to fertilise an egg. This mucus may
 also help prevent bacteria and infection reaching the womb.

 In conjunction with colleagues in UCD, under the leadership of Professor S Carrington, the
 investigators would like to investigate some of the properties of human cervical mucus.The
 investigators propose to do this by taking samples of cervical mucus around the time of
 ovulation and also approximately one week later in fertile women and sub-fertile women. Then
 to monitor ovulation with an ultrasound scan (follicle tracking) of the woman's ovaries and
 urinary ovulation kits and take blood for oestrogen, progesterone, LH and FSH levels.

 The investigators wish to determine if there are differences between the mucus of these women
 and how it may impact on sperm function and on fertility.
This study will investigate functional, biochemical and molecular properties of cervical
 mucus at various times of the menstrual cycle in fertile and sub-fertile women. The
 investigators would aim to also investigate the interaction of cervical mucus with sperm and
 capacitation and to investigate the impact cervical surgery and differing diagnoses of
 sub-fertility have on cervical mucus.

 Study aims:

 1. To determine the functional, biochemical and molecular properties of cervical mucus
 through out the menstrual cycle in fertile women.

 2. To determine if there is a difference in these properties of cervical mucus in fertile
 and sub-fertile women.

 3. To determine whether these properties are influenced by the sub-fertility diagnostic
 group eg unexplained, endometriosis, tubal factor, sperm factor.

 4. To examine the interaction between cervical mucus and sperm in women with normal
 fertility and sub-fertility.

 5. To examine the impact of cervical surgery on cervical mucus functional, biochemical and
 molecular properties and sperm interaction.
Inclusion Criteria:

 1. Fertile women

 1. Age 18-42 years

 2. Regular ovulatory menstrual cycle

 3. Previous spontaneous pregnancy to term

 4. No history of subfertility

 5. No underlying medical condition or immunosuppression

 6. No history of hormonal medication or pregnancy in past two months

 7. Capable of giving informed consent to participate in study

 2. Non fertile women a.Age 18-42 years b.Regular ovulatory menstrual cycle c.Difficulty
 conceiving for greater than 12 months e.No underlying medical condition or
 immunosuppression f.No history of hormonal medication in past two months g.Capable of
 giving informed consent to participate in study

 Exclusion Criteria:

 1. hormonal medication

 2. pregnancy

 3. not capable of giving consent

 4. age <18 years or > 42 years

 5. underlying medical condition