Many patients, after artificial valve replacement surgery, receive warfarin anticoagulant therapy. However, it has been reported that warfarin administration during pregnancy can cause fetal teratogenicity. With reference to this case, we will discuss how warfarin administration in mid-pregnancy caused severe cerebral hemorrhage in the newborn child. The 36-year-old patient in this case underwent aortic valve replacement surgery when she was 11 years old; this requires the continued use of warfarin after surgery. Although she was advised otherwise, the patient became pregnant. The warfarin treatment was discontinued at 5 weeks of gestation and she began self-injection of heparin; however, her health quickly deteriorated requiring an emergency, warfarin treatment. On gestation week 21, she was admitted to our hospital with a high likelihood of a spontaneous abortion. A week later, transesophageal ultrasonography revealed a thrombus in the patient's aortic valve. Because of this finding, we re-started warfarin administration. At 32 weeks of gestation, cardiotocography showed decreased fetal heart rate; thus, an emergency Cesarean section was performed. A baby was delivered, weighing 1,702 g with an Apgar Score of 1 at 1 minute and 4 at 5 minutes. Cranial computed tomography of the infant showed bilateral intraventricular hemorrhage and ventricular dilation. In order to protect the mother and prevent hemorrhage in the newborn, it is recommended that a continuous heparin infusion should be administered to the pregnant woman after the 36th week of gestation. Regarding the impact on the infant, it is considered that continuous intravenous administration of heparin is safer during the third trimester of pregnancy. However, administration of heparin alone makes the preventive effect of thrombosis uncertain. When warfarin is administered in pregnancy, pregnancy management should be performed bearing the risk of fetal cerebral hemorrhage in mind.

Purpose In a previous study, a new method was described using the sperm immobilization test (SIT) with computer‐aided sperm analysis (CASA). However, obtaining high‐quality sperm as needed was a known issue. Here, we compared the results of using frozen‐thawed sperm and fresh sperm for the SIT using the CASA method. Methods For the frozen‐thawed preparation, 500 μL of condensed semen and 500 μL of Sperm Freeze were mixed in a cryovial and cryopreserved in liquid nitrogen. Density gradient centrifugation was used for the collection of motile sperm in both the fresh and frozen‐thawed sperm preparations. A total of 50 serum samples were prepared for both the fresh and frozen‐thawed sperm with each sample tested containing 10 μL of serum, 1 μL of either fresh or frozen motile sperm suspension, and 2 μL of complement. Sperm motilities were measured using CASA after a 1‐hour incubation period for both fresh and frozen‐thawed sperm. Results Both fresh and frozen‐thawed sperm reacted similarly when exposed to serum containing sperm‐immobilizing antibodies asserting the use of frozen‐thawed sperm for the diagnosis of immunological infertility. Conclusion These results suggest the possibility of using cryopreserved sperm for the SIT when fresh sperm is unavailable.

Aim Ovarian tissue cryopreservation (OTC) is performed for fertility preservation in cancer patients undergoing chemotherapy. Although anti‐Müllerian hormone is used as a marker for ovarian reserve, serum levels do not always correlate with the number of follicles. Additionally, the follicle development stage most affected by chemotherapy is unclear. We examined the association between serum anti‐Müllerian hormone levels and the number of remaining primordial follicles after chemotherapy, as well as which follicle stage is most affected by chemotherapy before ovarian cryopreservation. Methods Thirty‐three patients who underwent OTC were divided into the chemotherapy (n = 22) and non‐chemotherapy (n = 11) groups; their ovarian tissues underwent histological examination. Pathological ovarian damage induced by chemotherapy was assessed. Ovarian volumes were estimated from weights. We compared the number of follicles at each developmental stage as a percentage of primordial follicles between the groups. The relationship between serum anti‐Müllerian hormone level and primordial follicle density was analyzed. Results The chemotherapy group had a significantly lower serum anti‐Müllerian hormone level, ovarian volume, and density of developing follicles than the non‐chemotherapy group. Serum anti‐Müllerian hormone levels correlated with primordial follicle density only in the non‐chemotherapy group. The chemotherapy group had significantly lower numbers of primary and secondary follicles. Conclusions Chemotherapy induces ovarian damage and follicle loss. However, serum anti‐Müllerian hormone level does not always reflect the number of primordial follicles after chemotherapy, and chemotherapy more significantly affects primary and secondary follicles than primordial follicles. Many primordial follicles remain in the ovary after chemotherapy, supporting OTC for fertility preservation.

Migration of intrauterine devices (IUDs) into the abdominal cavity is rare. In this report, we describe a patient in whom a levonorgestrel intrauterine system (LNG-IUS) device was initially misplaced outside of the uterus, likely due to stenosis of the cervix following a conization procedure for carcinoma in situ . The patient presented with persistent abdominal pain and vaginal bleeding. The LNG-IUS was not visible on physical examination and ultrasound imaging, requiring intraoperative abdominal radiography and postoperative computed tomography for localization. Once localized, we proceeded with the removal of the foreign body in the retroperitoneal space by laparoscopy. Misplacement of an IUD such as LNG-IUS outside of the uterus after a conization procedure should be suspected in women with persisting symptoms, and this possibility should be diligently assessed.

Resuscitative hysterotomy (RH) is a resuscitation technique, allowing the restoration of a pregnant patient's heartbeat. Here, we reported a case of RH performed in a patient with cardiac arrest as a complication of a peripartum cardiomyopathy. A 29-year-old woman with suspected hemolysis, elevated liver enzymes, low platelet syndrome was admitted to the hospital. Cardiopulmonary resuscitation and RH were initiated at 30 weeks of gestation. The infant was successfully delivered 2 min after the mother's cardiac arrest, weighting 1388 g. At the first minute, the Apgar score was 3 and the 5th minute was 6. After delivery, defibrillation was performed on the mother and restoration of spontaneous circulation was observed. However, she was hemodynamically unstable and approximately 2 months later she died. After cardiac arrest, it is possible that RH could improve the hemodynamic status. The opportunity of performing a RH is rare; however, it is necessary to be familiarized with the technique as a resuscitation method.