Background: Globally, the average age at menarche was 16–17 years approximately 100 years ago, whereas it has now decreased to 12–13 years. A cohort study published in 2024 involving 71,341 participants titled “Menarche and Time to Cycle Regularity Among Individuals Born Between 1950 and 2005 in the US” reported a decline in the mean age at menarche from 12.5 years among women born between 1950 and 1969 to 11.9 years among those born between 2000 and 2005. Early menarche has been shown to increase the risk of type 2 diabetes mellitus, metabolic syndrome, breast cancer, insulin resistance, obesity, and cardiovascular diseases. Aim: To assess the association between age at menarche and body mass index in adolescent girls aged 11–19 years in middle and high schools in Ulaanbaatar. Materials and Methods: A cross-sectional study was conducted among 75 adolescent girls aged 11–19 years from General Secondary School No. 42 in Songinokhairkhan District, Ulaanbaatar. Data were collected using a structured questionnaire covering demographics, age at menarche, and potential influencing factors. Body mass index was evaluated using international standard criteria. Result: Among the participants, age at menarche occurred at 12 years in 34.7%, 13 years in 26.7%, 14 years in 16.0% and 15 years in 5.3%. Nutritional status assessment showed that 60 participants (80.6%) had a normal body mass index, 13 (17.3%) were underweight, 1 (1.3%) was overweight and 1 (1.3%) had class I obesity. With respect to residential status, 42 participants (56.0%) resided in private houses, 17 (22.7%) in traditional gers, 15 (20.0%) in apartments and 1 (1.3%) in rented housing. Conclusion An association between body mass index and age at menarche was demonstrated among the adolescent girls included in this study, with higher body mass index associated with an earlier age at menarche.

Schizencephaly is an uncommon, congenital disorder showing developmental cerebral malformation characterized by clefts in the cerebral cortex, which extends from the ependymal surface of the ventricle through the white matter to the pial surface. Magnetic resonance was more sensitive than computed tomography in detecting the clefts [1]. Yakovlev and Wadsworth first coined the term “schizencephaly” in 1946, in their study on cadavers [2]. Schizencephaly is associated in some cases with microcephaly, hydrocephalus, or other malformations such as septo-optic dysplasia [1, 3]. This disorder can be detected in vivo by ultrasonography [4]. Here, we present a rare case of a 9-month-old female infant with underdevelopment of the right cerebral hemisphere.

Background: We aimed to study the etiology and transmission route of diseases introducing the modern, rapid and high-sensitivity molecular genetic diagnostic methods for salmonellosis. Material and Method: In the study, we collected 680 stool samples and defined organisms of food intoxication by identification of bacteria, polymerase chain reaction (PCR) and determined serotype and antibiotic resistance. Result: Salmonella spp was detected from the stool of 25 (42.3%) patients out of 59 outpatient clinic and of 170 (27.4%) patients out of 621 inpatient clinic with diagnosis of food intoxication. In total there was detected 195 salmonella spp, and out of this isolated Sal. typhimurum in 193 (98.9%), and Sal. enteritidis was in 2 (1.1%) patients, respectively. We defined Sal. typhimurum in selected 32 cultures and did not detect resistant gene DT-104 ACS-SuT by PCR. Conclusion As resulted in the survey, we defined 195 (28,6) Salmonella typhimurum among the 680 patients who were suffered from food intoxication, and revealed fast foods, animal derived foods such as chicken, fish caused the food intoxication. Sal. typhimurium not resistance to antibiotics.

Introduction: Due to cervical spondylosispatients with cervical stenosis who hadhyperextension trauma developed spinalcord stress and contusions, tetraplegia anddisability and mortality. Cervical spondylosispatients with hyperextension traumatreatment management still not clearedout throughout the world and very fewresearch has been done in our country.We have been introduced our surgical andrehabilitation comparison research study ofcervical spondylosis trauma in 2015. Our goalis to develop treatment management forthe hyperextension trauma in patients withcervical spondylosis.1. To compare surgical treatmentresults between patients who hadhyperextension injury to the cervical spinewhich were treated at the Departmentof Spinal Surgery of the National Traumaand Orthopaedic Research Center ofMongolia.2. To study biomechanical effects after thesurgeryMaterial and methods: 42 cervicalspondylosis patients with hyperextensioninjury have been chosen retrospectively toevaluate the surgical, conservative, andrehabilitative treatments and results wereanalyzed by SPSS, EXCEL program who weretreated at the Department of Spinal Surgeryof the National Trauma and OrthopaedicResearch Center of Mongolia from 2012-September 2016. Over 20% canal stenosiscases were chosen for laminectomy andanterior discectomy and fusion surgeriesalong with conservative and rehabilitationtreatment. Up to 20% canal stenosis 10cases which is 23.8% of all patients weretreated by conservative treatment.Results: From 42 patients there was 10females and 32 males. Average ages were56±7.9. By the cause of injury 62% werecar accident, 23% motorcycle accident, 10%fall from horse riding and 5% were otherfalls respectively. All patients had neurologicdeficits according to the level of spinal cordinjury. 36 (85.7%) patients had C4-C5 andC5-C6 level injury and 15 (35.7) patients wererecovered from spinal shock after high dosesteroid treatment. According to the X-RAYall patients had cervical spondylosis signand 4 (9.5%) of them had facet fractureswith stable spine condition. After CT scanspinal cord injury located at C3-C4, C4-C5and C5-C6 levels and patients developedfacet arthrosis, ossification of ligaments andintervertebral discs. Clinical signs and CT scans were evaluated and 4 cervical spondylosispatients with hyperextension injury hadlaminectomy and 2 patient had anteriordiscectomy and fusion surgeries. Canalstenosis is decompressed after laminectomysurgery and cervical lordosis is reduced by 7degrees but after anterior discectomy andfusion surgery cervical lordosis is reducedby 3 degrees. Neurological deficit increasinglaminectomy cases had C5 palsy becauseof cord shift (2.4-4mm) which resulted bydenticulate ligament tethering.Conclusion: There were no significantstatistical (P≤.05) differences betweensurgical and rehabilitation treatmentsin cervical spondylosis patients withhyperextension injury who’s canal stenosiswere below 20% [1,2,3,4,5].In our practice itis essential to make laminectomy and anteriordiscectomy and fusion surgeries in 72 hoursafter trauma to help the patient recoverfrom the spinal shock and reabsorption ofcord contusion. For one or two level canalstenosis especially with the OPLL, artificialdisc replacement and ADF surgeries showedbetter results. In multiple level canal stenosiswith OLF and OPLL cases laminectomyand laminoplasty are choice for surgery. Incomparison to foreign study/ Biomechanicalinvestigation of spinal cord injury and diseasein cervical spine Batbayar.K Seoul.2016[2]/ our surgical treatment showed similarresults. Among cervical spondylosis patientswith hyperextension trauma cases whotreated in Spine Department of NationalTrauma and Orthopaedic Hospital, mortalityand disability is increasing and it is essentialto follow correct diagnostic and treatmentalgorithms.

Spent brewer’s yeast Saccharomyces cerevisiae was hydrolysed using bovine pancreatictissue as an enzyme source. The resulting hydrolysate contains 4.7% amino nitrogenand the ratio Namin/Ntot was determined as 0.6. Moreover, other physico-chemicalparameters of the hydrolysate were also comparable with the same products on foreignmarkets. Toxicity of hydrolysate is low (LD50 2,5 g/kg), microbiological and heavy metalcontamination were in required range. The IC50 value of obtained yeast hydrolysate’santioxidative activity according to the DPPH assay was 1.6±0.5 mg/ml, while IC¬50 ofthe yeast hydrolysate rich in Cyclo-His-Pro evaluated as 1.9 mg/mL.