Eligibility Criteria:
Inclusion Criteria:
Donor:
* a woman between 18 and 40 years old;
* generally healthy and do not suffer from an immunological or other chronic diseases;
* have regular menstruation or do not menstruate due to birth control pills, gestagen pills (mini-pills), etonogestrel birth control implant or hormone IUD;
* not or do not have a desire to become pregnant within the next year;
* willing to be asked personal questions in the form of medical history, current use of medication, sexuality and sexual behavior;
* willing to refrain from vaginal intercourse unless a condom is used during certain periods of participation; and
* can read and understand information material in Danish or English.
* Accept not to use any intravaginal products such as tampons, menstrual cup, sex toys, vaginal cleaning products, spermicide products and vaginal lubrication.
Recipient:
* a woman between 18 and 40 years old;
* generally healthy and do not suffer from an immunological or other chronic diseases;
* have regular menstruation or do not menstruate due to birth control pills, gestagen pills (mini-pills), etonogestrel birth control implant or hormone IUD;
* not or do not have a desire to become pregnant within the next year;
* willing to be asked personal questions in the form of medical history, current use of medication, sexuality and sexual behavior;
* willing to refrain from vaginal intercourse unless a condom is used during certain periods of participation; and
* can read and understand information material in Danish or English.
* Accept not to use any intravaginal products such as tampons, menstrual cup, sex toys, vaginal cleaning products, spermicide products and vaginal lubrication.
Exclusion Criteria:
Donor:
* Being pregnant
* Any medical history of bacterial vaginosis, Trichomoniasis, Syphilis, HPV, herpes, intraabdominal infections, recurrent urine infections or Mycoplasma infections.
* Positive test result of HIV, Hepatitis A, B and C, Chlamydia, Gonorré, Mycoplasma, Trichonomas, HPV, herpes simplex and Streptococcus A, B, C and G.
* Currently pregnant or lactating.
* Any history of Gonorré and/or Chlamydia during the last year.
* Have been travelling or have had a sexual partner who has been travelling to countries with Ebola and/or Zika virus within the last year.
* Any other medical history, current use of medicine, travels or behavior which from a doctor's perspective is considered not suitable for being a donor.
* Hysterectomized
* Have participated in other medical studies within the last 30 days
* Removal of IUD, cervical cryotheraphy or cervical laser-treatment up until 3 months before screening.
* Any condition requiring the use of antibiotics in the investigation period
* Usage of long-acting hormonal therapy within the last 3 months prior to screening.
* Any social, medical or psychological condition including any history of drug and alcohol abuse, where it is evaluated that the participant cannot adhere to the protocol
* Unsatisfying examination and screening results evaluated by a doctor
* Any sexual habits, history or sexual partner, where the behavior can lead to an increased risk of sexual infections.
* Usage of medicine, recently vaccinated or other behavior which is considered to be a hinder for participation.
Recipient:
* Being pregnant
* Planning to become pregnant within the next 6 months
* Lactating
* Being less than 8 weeks post partum
* Known positive HIV/AIDS infection or other immune diseases
* Positive test result of HIV, Hepatitis A, B and C, Chlamydia, Gonorré, Mycoplasma, Trichonomas, positive urine hCG and HPV.
* Have participated in other medical studies within the last 30 days
* Removal of IUD, cervical cryotheraphy or cervical laser-treatment up until 3 months before screening.
* Any condition requiring the use of antibiotics in the investigation period
* Usage of long-acting hormonal therapy within the last 3 months prior to screening.
* Any social, medical or psychological condition including any history of drug and alcohol abuse, where it is evaluated that the participant cannot adhere to the protocol
* Unsatisfying examination and screening results evaluated by a doctor