[Mathew's clip, an alternative for removal of IUDs with no visible threads. Experience of Family Planning Service].

Background: The absence of IUD visible threads in the cervix is a complication of the intrauterine device. The IUD withdrawal in these cases was performed with Novak cannula or curettage instrumented under anesthesia and surgery. Its extraction with Mathew clip is an alternative.

[Complex location of a single rod contraceptive implant].

Background: The subdermic single-rod contraceptive implant is used for more than 2.5 million of womens around the world (in Mexico there are around 600 000 collocated implants). in a small number of cases an incorrect insertion procedure is caused by a complex localizaron.

[Contraception and breastfeeding. Spacing of pregnancies. Present concepts].

The risk of pregnancy in breastfeeding should be a concern of women. Family planning programs in the post natal period contraceptive choices offer high efficiency. Breastfeeding is a natural contraception method (LAM) as a contraceptive shield has 98% efficiency.

[Contraception and breast feeding. Spacing of pregnancies. Present concepts].

The risk of pregnancy in breastfeeding should be a concern of women. Family planning programs in the postnatal period contraceptive choices offer high efficiency. Breastfeeding is a natural contraception method (LAM) as a contraceptive shield has 98 % efficiency.

[Posplacenta intrauterine device. Guide wires not visible].

Background: Little information exists about the follow- up of the strings of intrauterine device (IUD) applied posplacenta. When the strings are of 10 cm in length are within the uterine cavity should be visible after postpartum involution.

Objective: To know the incidence of visible strings of intrauterine device (IUD) after posplacental insertion and to establish guidelines of follow-up when strings are not seen.

Comparative pharmacokinetics and pharmacodynamics after subcutaneous and intramuscular administration of medroxyprogesterone acetate (25 mg) and estradiol cypionate (5 mg).

Background: The efficacy of contraceptives is affected by its route and ease of administration. Herein, both pharmacokinetics and pharmacodynamics of the once-a-month combined injectable contraceptive medroxyprogesterone acetate (MPA) plus estradiol cypionate (E(2)-Cyp) were compared after intramuscular (IM) or subcutaneous (SC) injection in women of reproductive age.

Study Design: Thirty women were randomly assigned to the SC (n=15) or IM (n=15) route of MPA 25 mg+E(2)-Cyp 5 mg administration.

Complex localization of single-rod contraceptive implant. Report of two clinical cases.

Background: The subdermal single-rod contraceptive implant is used by more than one million women worldwide. In México there are ~ 600,000 colocated implants. Cases of complex implant localization caused by a deep insertion procedure have been reported.

[No-scalpel vasectomy. Profile of acceptance and results].

Background: Men have few effective methods for birth control. The surgical method vasectomy is highly safe and effective, although in Mexico represents only 2.4% of all contraceptive methods used.

[Random comparative study between intrauterine device Multiload Cu375 and TCu 380a inserted in the postpartum period].

Objective: To evaluate safety and effectiveness of the intrauterine device Multiload Cu375 compared with the TCu 380A inserted in the postpartum period.

Patients And Methods: In a randomized comparative study carried out in the National Perinatology Institute, intrauterine devices MLCu 375 and Tcu 380A were inserted to 157 patients who voluntary accepted, and previously signed informed consent. There were four instances for the intrauterine devices insertion: within 10 minutes after vaginal delivery, during cesarean section (immediate postplacental insertion) and postpartum-postcesarean insertion (in the time range of 10 min to 48 h).

The limited clinical usefulness of taking a history in the evaluation of women with tubal factor infertility.

Objective: To evaluate whether patient histories of gynecological infections predict tubal pathology seen at laparoscopic exam in infertile women.

Design: Cross-sectional analysis from a subset of case-control subjects.

Setting: Tertiary-level public hospitals with infertility clinics, Mexico City.

[Aspirated sperm activation from deferens in an ionic media similar to seminal plasma].

Objective: To compare motility on sperm obtained from the vas deferens and incubated in seminal plasma (PS), a ionic medium similar to seminal plasma (MA) and HTF-HEPES culture medium.

Material And Method: Aspirates from de proximal vas deferens were obtained in eight healthy men during vasectomy and separated in three aliquots (5-6 millions sperm/mL). Aliquots were incubated on PS, MA and HTF-HEPES.

A 13-month multicenter clinical experience of a low-dose monophasic oral contraceptive containing 20 microg ethinylestradiol and 75 microg gestodene in Latin American women.

This prospective, multicenter study was conducted to evaluate the contraceptive reliability, cycle control and tolerability of a 21-day oral contraceptive regimen containing 20 microg ethinylestradiol and 75 microg gestodene in four Latin American countries (Mexico, Argentina, Brazil and Colombia). Participants took trial medication daily for 21 days. Contraceptive efficacy, cycle control and tolerability were evaluated over a period of 13 cycles.